NOVELTY - A large oil tea tree bonsai is cultivated by: selecting long wind frost or more than 10 years with diameter of 8-40 cm, strange shape, and twisted and colorful large oil tea tree bonsai from October to February; and cutting off main root and lateral root, retaining fiber length, trimming branches, retaining pile height, truncating into bast skin at length of 1-5 cm, covering with nutritional soil at thickness of 2-9 cm, wrapping with plastic bag to obtain tree stump, placing into mud slurry, standing for 10-16 hours, and placing in cool place to obtain slurry stump.    USE - Method for cultivating large oil tea tree bonsai (claimed).    ADVANTAGE - The method has high survival rate, and short output cycle.    DETAILED DESCRIPTION - A large oil tea tree bonsai is cultivated by:    (A) selecting long wind frost or more than 10 years with diameter of 8-40 cm, strange shape, and twisted and colorful large oil tea tree bonsai from October to February;    (B) cutting off main root and lateral root to 3-5 cm, retaining fiber length of 6-18 cm, trimming branches, retaining pile height of 30-60 cm, truncating into bast skin at length of 1-5 cm, covering with nutritional soil at thickness of 2-9 cm, wrapping with plastic bag to obtain tree stump, placing into mud slurry, standing for 10-16 hours, taking out, and placing in cool place to obtain slurry stump;    (C) transplanting into flower pot, filling soil, lime and sand at mass ratio of 1:0.5:3-4 with thickness of 1-3 cm, filling 1/3-2/3 second nutritional soil, testing nutritional soil temperature at 18 degrees C by filling thermometer, filling nutritional soil, compacting, pouring water, maintaining temperature at 20-28 degrees C, pouring 10-15 vol.% water every 6-15 days, applying 1.5-5 vol.% fertilizer every 15-26 days, maintaining temperature at 28-40 degrees C, pouring 15-22 vol.% water every 3-7 days, applying 1.5-5 vol.% fertilizer every 7-15 days, and recovering growing state to length of 3-15 cm;    (D) selecting healthy and strong growth as scion tree with one or more axillary bud and branch length of 4-7 cm, cutting, soaking into nutritional liquid at 28-38 degrees C for 6-8 hours, grafting at length of 3-15 cm, and wrapping with thin film width of 2-3.5 cm;    (E) covering with thin film at wide of 1-1.5 m, length of 1.5-6 m, receiving full illumination by opening thin film at 7-10 a.m., covering shading net at 10 a.m. to 4 pm, keeping light transmittance rate of 35-50%, maintaining temperature at 20-32 degrees C and relative humidity at 50-75%, covering thin film at 4 pm, maintaining temperature to 15-24 degrees C, pouring 10-15vol.% water every 6-15 days, maintaining temperature to 28-40 degrees C, pouring 15-22 vol.% water every 3-7 days, maintaining temperature to 15-24 degrees C, applying organic compound fertilizer every 6-12 days, maintaining temperature to 28-40 degrees C, applying fertilizer every 4-7 days; and    (F) designing.    Nutritional soil comprises 5-10 pts. wt. sugar, 10-25 pts. wt. amino acid, 0.5-1.8 pts. wt. vitamin, 0.05-0.16 pt. wt. sodium chloride, 0.25-0.6 pt. wt. calcium hydrophosphate, 0.1-0.35 pt. wt. organic compound fertilizer, 2.5-4.8 pts. wt. sheep bone powder, 0.1-0.2 pt. wt. magnesium sulfate, 10-15 pts. wt. rice husk and balance forest topsoil. Vitamin is vitamin A, vitamin D, vitamin E and/or vitamin B. Nutritional soil is prepared by heating water at 32-46 degrees C, adding cane sugar, amino acid, vitamin, sodium chloride and calcium hydrophosphate, stirring, dissolving, adding 2/3 forest topsoil, stirring, cooling to normal temperature, adding organic compound fertilizer, sheep bone powder, magnesium sulfate and rice husk, stirring, mixing uniformly, and adding 1/3 forest topsoil. Mud slurry comprises 12-25 pts. wt. of 100-180 ppm catalyst, 1.5-3.0 pts. wt. calcium superphosphate, 3-7 pts. wt. of 45-95 ppm thiophanate solution, 20-35 pts. wt. water and balance fertile soil. Mud slurry is prepared by heating water at 40-50 degrees C, adding calcium superphosphate, completely dissolving, adding catalyst, stirring uniformly to obtain mixed liquid, mixing 1/3 fertile soil and thiophanate solution into mixing machine, adding into mixed liquid, stirring, adding remaining fertile soil, and stirring. Second nutritional soil comprises 20-35 pts. wt. rotten manure, 5-8 pts. wt. sawdust, 5-8 pts. wt. livestock poultry bone or fish bone powder, 5-8 pts. wt. edible fungi waste material, 3.5-6.5 pts. wt. bioorganic fertilizer, 1.5-2.5 pts. wt. functional microorganism and 40-60 pts. wt. forest topsoil. Functional microorganism is nitrogen-fixing bacteria, potassium bacteria, Rhizobium and Bacillus. Second nutritional soil is prepared by mixing rotten manure, sawdust, livestock poultry bone or fish bone powder and edible fungi waste material into mixer, superfine crushing, adding functional microorganism, stirring uniformly, regulating water content to 15 -28% to obtain nutrition agent, mixing forest topsoil and bioorganic fertilizer, adding nutrition agent, stirring, and mixing. Fertilizer is rotten manure, phosphate, sulfate and water at mass ratio of 6:4:0.15:30-50. Sulfate is magnesium sulfate, zinc sulfate and sodium sulfate. Nutrition liquid is 2-4 pts. wt. of 12-18% amino acid solution, 1-4 pts. wt. of 5-10% plant polysaccharide aqueous solution and 1-2 pts. wt. of 25-50 ppm plant hormone modulator aqueous solution.