NOVELTY - Eco-friendly liquid fertilizer comprises 1-2 pts. wt. zinc sulfate, 5-6 pts. wt. Artemisia leaf, 12-16 pts. wt. straw ash, 5-6 pts. wt. potassium fulvate, 2-4 pts. wt. potassium hydroxide, 7-10 pts. wt. dendrobium, 6-8 pts. wt. oyster powder, 8-10 pts. wt. urea, 6-7 pts. wt. potassium dihydrogen phosphate, 2-3 pts. wt. calcium propionate, 0.1-0.3 pts. wt. triacontanol, 0.1-0.2 pts. wt. ethephon, 3-4 pts. wt. magnesium sulfate heptahydrate, 9-15 pts. wt. bone powder and 8-12 pts. wt. complexing agent.    USE - Eco-friendly liquid fertilizer used for promoting enlargement of root and leaves.    ADVANTAGE - The eco-friendly liquid fertilizer is cost-effective and easy to absorb by crops.    DETAILED DESCRIPTION - Eco-friendly liquid fertilizer comprises 1-2 pts. wt. zinc sulfate, 5-6 pts. wt. Artemisia leaf, 12-16 pts. wt. straw ash, 5-6 pts. wt. potassium fulvate, 2-4 pts. wt. potassium hydroxide, 7-10 pts. wt. dendrobium, 6-8 pts. wt. oyster powder, 8-10 pts. wt. urea, 6-7 pts. wt. potassium dihydrogen phosphate, 2-3 pts. wt. calcium propionate, 0.1-0.3 pts. wt. triacontanol, 0.1-0.2 pts. wt. ethephon, 3-4 pts. wt. magnesium sulfate heptahydrate, 9-15 pts. wt. bone powder and 8-12 pts. wt. complexing agent. Complexing agent comprises 6-8 pts. wt. turtle shell, 4-6 pts. wt. horn, 3-5 pts. wt. calcium chelated amino acid, 3-5 pts. wt. manganese chelated amino acid, 3-5 pts. wt. zinc chelated amino acid, 3-5 pts. wt. EDTA chelated iron, 4-7 pts. wt. rare earth element, 3-4 pts. wt. effective microorganism microbial inoculum, 8-14 pts. wt. aquaculture waste, 15-20 pts. wt. bird manure, 3-4 pts. wt. volcanic rock and 2-3 pts. wt. chromite spinel. Complexing agent is prepared by mixing aquaculture waste, aquaculture waste, bird excrement, effective microorganism microbial inoculums and effective microorganism microbial inoculums, and then aerobic fermentation is carried out for 3-5 days to obtain fermentation clear liquid. Fermentation clear liquid is mixed with lime, and filter to obtain former solution. Remaining components with water (300-400 times) mass, and stirred for 2-3 hours and filtered to obtain later solution. The solutions are mixed in a reaction kettle at 40-60 degrees C and stirred for 90-120 minutes. An INDEPENDENT CLAIM is included for a method for preparing eco-friendly liquid fertilizer, which involves:    (A) mixing oyster shell, straw ash and bone powder with water (220-260 times), and uniformly stirring for 40-60 minutes; and    (B) filtering the mixture to obtain nutrient liquid, and then adding remaining components at 60-80 degrees C and filtering and packaging.