The utility model particularly relates to a checkout system of circuit breaker pneumatics mechanism heater, the utility model discloses at current relay of power head end installation of each heater of circuit breaker pneumatics mechanism, determine the heater and whether have a damage with not working through observing the bright of lighting bulb, replace the method of " surveys " with the method of " seeing ", not only the inspection is convenient, has saved division, has closed the loaded down with trivial details operation of circuit breaker mechanism chamber door in addition, has easy operation and reduction maintenance person person intensity of labour's advantage.