The invention discloses a lythidathion-containing insecticidal composition. The lythidathion-containing insecticidal composition comprises main effective active components, namely lythidathion and imidacloprid or acetamiprid, wherein the mass percent of lythidathion to imidacloprid or acetamiprid is (1-70) to (70-1). According to the lythidathion-containing insecticidal composition, insecticidal spectra of the lythidathion and the imidacloprid or the acetamiprid are expanded; the lythidathion-containing insecticidal composition has lots of acting sites to pests, can be used for controlling various ground and underground pests at field crops, fruit trees, vegetables and other crops, and can be applied to various medicament application manners such as atomizing, spraying with soil, furrow application, hole application and fertigation, and furthermore, the application dose of each bioactive substance can be reduced, so that the use cost is lowered; the lythidathion-containing insecticidal composition achieves medicament complementation, plays an obvious synergistic effect and delays the generation of resistances of the pests.