The invention relates to a sterilization stirring device for solid breeding of insect pathogenic nematodes, aiming at solving the problems that during solid breeding of the insect pathogenic nematodes, material is wasted and production cost is high because sterilization and stirring are carried out separately, manual operation is adopted for stirring, operation is complicated, discharge is difficulty and material residue exists in the stirring tank. One end of an inoculation tube is inserted into an inner cavity of the tank body, the other end of the inoculation tube is sealed, the output shaft of a motor is connected with a stirring paddle, a feeding hole is formed in the outside wall of the upper part of the tank body, the outside of the feeding hole is sealed, the other end of the tank body is tapered, a discharge hole is formed in the other end of the tank body, the steam pipe is in semi-circular arc shape, the steam pipe is laminated to the upper part of the inner wall of the inner cavity along the circumferential direction of the inner cavity, a plurality of spray holes are uniformly formed in the lower part of the wall of the steam pipe, and two ends of the steam pipe are both communicated with a steam delivery pipe. The sterilization stirring device is used for the field of pest control.