Psocids occurrence was detected in flour warehouse from March-2017 to February-2018 by a corrugated board trap. The location of psocids and its relationship with temperature and humidity were analyzed by geostatistics contour mapping technology. The results showed that 25 131 psocids were caught in the flour warehouse which indicated that psocids were in nonuniform distribution in the warehouse，and the number of psocids closely related to the temperature and humidity of the flour warehouse. The infestation hot spot of psocids was Bran Packing Room, the junction region with Bran Packing Room and Flour Storage Room, the area of Auto Baler Machineand Belt Conveyor, and Grain Unloading Tunnel. The distribution hot spot area of psocids had characteristics of long-term persistent existence, and had risks of spreading outside. In practical production, targeted prevention measures can be taken according to the distribution of hot spots of psocids.