NOVELTY - Insecticidal biological organic fertilizer comprises phellodendron (20-30 parts by weight (pts.wt.), rape seed leftover (15-20 pts.wt.), wooden meal (10-20 pts.wt.), garlic (10-20 pts.wt.), wood sawdust (8-10 pts.wt.), cortex (8-10 pts.wt.), field pennycress (10-12 pts.wt.), humic acid (20-40 pts.wt.), manure (10-22 pts.wt.), biological bacterium (3-5 pts.wt.), zinc sulfate (2-4 pts.wt.), magnesium sulfate (2-4 pts.wt.), sodium sulfate (1-2 pts.wt.), and borax (1-2 pts.wt.).    USE - As an insecticidal biological organic fertilizer (claimed), useful for preventing plant diseases and killing underground insect.    ADVANTAGE - The fertilizer reduces the organic pesticide, and the usage amount of the chemical fertilizer; avoids pollution; is able to modify the soil; provides protection to the crop; protects ecological environment; and improves crop yield.    DETAILED DESCRIPTION - Insecticidal biological organic fertilizer comprises phellodendron (20-30 parts by weight (pts.wt.), preferably 28 pts.wt.), rape seed leftover (15-20 pts.wt., preferably 16 pts.wt.), wooden meal (10-20 pts.wt., preferably 10 pts.wt.), garlic (10-20 pts.wt., preferably 12 pts.wt.), wood sawdust (8-10 pts.wt., preferably 8 pts.wt.), cortex (8-10 pts.wt., preferably 8 pts.wt.), field pennycress (10-12 pts.wt., preferably 12 pts.wt.), humic acid (20-40 pts.wt., preferably 22 pts.wt.), manure (10-22 pts.wt., preferably 15 pts.wt.), biological bacterium (3-5 pts.wt., preferably 4 pts.wt.), zinc sulfate (2-4 pts.wt., preferably 3 pts.wt.), magnesium sulfate (2-4 pts.wt., preferably 3 pts.wt.), sodium sulfate (1-2 pts.wt., preferably 2 pts.wt.), and borax (1-2 pts.wt., preferably 2 pts.wt.). An INDEPENDENT CLAIM is included for preparation of the insecticidal biological organic fertilizer involving taking rape seed platinum, leftover, garlic rod, Celastrus angulatus, and herba patriniae, crushing, humidifying, and adding paulownia, charcoal, wood vinegar, humic acid, and biological bacterium, mixing it, fermenting at low temperature for 5-10 days, then carrying out high temperature fermentation for 30-40 days, to obtain organic fertilizer; adding the organic fertilizer to zinc sulfate, magnesium sulfate, sodium silicate and borax, and mixing them to obtain the fertilizer for tea.