NOVELTY - Controlling Chinese chive maggot, comprises (i) controlling larvae by taking take out Ginkgo biloba exocarp, pepper, sulfur, matrine, bio-active element, and taking white rot fungi and bacteria, mixed bacteria and fungus and alkaloids, crushing, adding water, and mixing; and (ii) taking larva liquid and applying withdrawn liquid, applying base fertilizer on hole, dressing or irrigating, so as to completely control larva, and adding white wine, water, sugar, glacial acetic acid and deltamethrin, and mixing, to obtain nematode liquid, and allowing cultivation.    USE - The method is useful for controlling Chinese chive maggot (claimed).    ADVANTAGE - The method has good trapping effect; utilizes biological source rich in nutrients, non-toxic, readily biodegradable, harmless to human body, and this it is environmental-friendly; can repair the damage caused by chemical pesticides on Chinese chive; promotes absorption of nutrients; provides resistance against Chinese chive maggot; has simple process; reduces utilization of pesticides; and is economical.    DETAILED DESCRIPTION - Controlling Chinese chive maggot, comprises (i) controlling larvae by taking take out 0.5-20 pts. wt. Ginkgo biloba exocarp, 0.5-17 pts. wt. pepper, 0.5-10 pts. wt. sulfur, 4-6 pts. wt. matrine, 3-4 pts. wt. bio-active element, and taking white rot fungi and bacteria, 6-12 pts. wt. mixed bacteria and fungus and 5-15 pts. wt. alkaloids, crushing, adding 16-80.5 pts. wt. water, and uniformly mixing; and (ii) taking larva liquid and applying withdrawn liquid, applying base fertilizer on hole, dressing or irrigating, so as to completely control larva, and adding 0.9-1.1 pts. wt. white wine, 9-11 pts. wt. water, 3-4 pts. wt. cane sugar, 2-3 pts. wt. glacial acetic acid and 0.09-0.11 pts. wt. deltamethrin, and mixing, and adding larvae liquid, to obtain nematode liquid, and taking a quantification vessel set with many imports, allowing cultivation, so as to trap adult maggots, winged insect, and maggots located on cultivation ground.