Abstract: Based on the general survey of forest pests in Nanchong city from 2014 to 2017, the total area of forest pests in Nanchong city was 89 140 hm², the area of pest occurrence was 65 320 hm², the area of disease occurrence was 20 560 hm², and the area of harmful plants was 3260 hm². In this survey, the species, hostplants, occurrence area, and specific distribution of forest pests in Nanchong city were investigated in detail. 33 kinds of main forest pests were found, including 19 kinds of pests, 12 kinds of diseases and 2 kinds of harmful plants, which provided important guidance for the prediction and control of forest pests.