Mixed biological pesticide containing nimbin

The present invention provides a compound biological pesticide containing nimbin. Said invention adopts zodium lauryl sulfate, polyoxyethylated alkylphenol, ammonium styrene polyoxyethylene ether sulfate and sodium alkene ethyl sulfate as emulsifying agent. The composition of said compound biological pesticide contains (by mass%) nimbin 0.2-5, biological pesticide 0.5-8, emulsifying agent 5-20 cosolvent 5-15, antifreezing agent 0.5-2, stabilizing agent 3-5, synergistic agent 0.2-1.5, pH value regulating agent 0.1-0.5 and water 45-70. It is a transparent liquid microemulsion agent, can be used for controlling various injurious insects.