The invention relates to an optical fiber fusion splicer cooling device which is used for solving the problem of overtemperature of the optical fiber fusion splicer in the operation process, and a technology of convenient disassembly and assembly is provided. The optical fiber fusion splicer cooling device comprises a base mechanism, a heat-dissipation system, a control system and a power supply. The base mechanism comprises a base plate, stilts and universal wheels. The stilts are telescopic. A power supply box and a control cabinet are arranged on the front end of the base plate. The heat-dissipation system is installed on the base plate through a clamping groove. The heat-dissipation system comprises fixed windows and exhaust fans. A mounting hole is formed at the middle position of each fixed window. A clamping hole is formed in the inner surface of each mounting hole. Each exhaust fan comprises a fan body and a supporting frame. An elastic clip is arranged on the outer end of each supporting frame. Each exhaust fan is in clamped connection with each mounting hole through the clamping hole and the elastic clip. The control system comprises a single-chip microcomputer, a temperature sensor and an intelligent switch. According to the invention, the ambient temperature of the optical fiber fusion splicer can be effectively maintained in a reasonable space, and the shutdown condition due to the operational overtemperature can be avoided effectively.