Abstract: The invention discloses a traceability system for pesticide residues, the main points of the technical scheme: the traceability system for pesticide residues, comprising the following steps; step 1, collecting the basic properties of a variety of pesticides commonly used in crops; step 2, collecting the degradation properties of pesticides in many different types of soils; step 3, collecting the rainfall, irrigation conditions and other agricultural operation factors; step 4, predicting the risk of pesticide residues on the surface of the soil after use, and speculating on the transfer pollution of pesticides to crops; step 5, predicting the pesticide residues available to leach into groundwater after pesticide use; step 6, predicting the pesticide residues available to leach into surface water after pesticide use.