NOVELTY - Rapid propagation of ecological lightweight matrix walnut seedling, comprises collecting ripe walnut fruits, cleaning with edible brine, drying, and spraying aqueous carbendazim disinfectant solution on the surface; choosing sand loam or non-sand loam seedbed for rootstock, sprinkling organic fertilizer powder on surface, burying the seeds inside the seedbed, spraying water, building small shed, and allowing to germinate; secondary insulating; choosing rootstock, cutting branches, and grafting; placing grafted seedling in a biodegradable nutritional bowl, filling nursery matrix, and watering.    USE - The method is useful for rapid propagation of ecological lightweight matrix walnut seedling (claimed).    ADVANTAGE - The method produces seedling with good quality, uses nutrition soil which does not damage the root system, ensures the seedling survival rate to be more than 98%, and adopts greenhouse having high density and intensification, which obviously saves seedling land.    DETAILED DESCRIPTION - Rapid propagation of ecological lightweight matrix walnut seedling, comprises (i) collecting ripe walnut fruits in mid-September, piling and removing the skin, cleaning with edible brine, drying, and spraying 800 times of aqueous carbendazim disinfectant solution on the surface; (ii) choosing sand loam or non-sand loam seedbed for rootstock, sprinkling organic fertilizer powder on surface at high-speed, then spraying 800 times of chlorothalonil and crystal trichlorfon for disinfecting soil and insecticide purpose, deep plowing soil to 35-45 cm, making a smooth surface of seedbed having width of 120-140cm, spacing at 15 cm and 20 cm, burying the seeds inside the seedbed, spraying water, drenching one-time, then building small shed of 40-60 cm height, covering, and allowing to germinate in shed at 25-30 degrees C; (iii) at 600 m altitude in late November and 600-800 m altitude in early November, placing the seedbed in a small shed and building a second outer layer film greenhouse at height of 100-300 cm, so as to form secondary insulation, then spraying water of 15-25 degrees C and fungicide; (iv) in May to July the following year, choosing vigorously flourishing rootstock, removing from the soil, cutting the branches in the shade, and grafting; (v) placing the grafted seedling in a biodegradable nutritional bowl, filling nursery matrix, placing in a neat nursery garden, spacing 30 cm and 40cm, separating into neat rows, and watering; where the nursery matrix consists 20-25 pts. cow dung and straw fermentation product, 25-30 pts. peat, 20-35 pts. perlite, 25-30 pts. garden soil and 1 pt. calcium magnesium phosphate, then spraying 800 times of chlorothalonil, and covering and turning back; (vi) building a shed in summer; (vii) 30-45 days after installing the bowl, observing the situation of grafting, if the grafting is unable to pick up the nutrients, cleaning the bowl, watering the fresh green leaves, pouring water containing 0.5% soluble nitrogen fertilizer, applying fertilizer and spraying pesticide; (viii) spraying 800 times of carbendazim and removing the crown of more than 15 cm height, and more than 30 cm width.