The present invention relates to a synergistic insecticidal composition comprising three components, a (A) spinosad, (B) abamectin or bifenthrin and (C) at least one selected from a group consisting of abamectin, acetamiprid, thiodicarb and triflumuron and to a process for preparing the insecticidal composition. The present invention is also related to a method to prevent, control and/or treat insect infestations in plants, plant parts and/or surrounding by applying the synergistic insecticidal composition comprising the three components (A), (B) and (C).本發明涉及含有如下三種組分:(A)賜諾殺、(B)阿巴汀或畢芬寧以及(C)選自阿巴汀、亞滅培、硫敵克和殺鈴脲中的至少一種的協同性殺蟲組成物以及製備該殺蟲組成物的方法。本發明還涉及通過施用包含三種組分(A)、(B)和(C)的協同性殺蟲組成物來預防、控制和/或處理植物、植物部分和/或其周圍的昆蟲感染的方法。