The invention discloses a breaker load current monitoring device. The breaker load current monitoring device comprises a heat conduction member which is arranged in a breaker casing and is fixedly connected with a breaker solenoid, and a load current monitoring unit arranged on the heat conduction member, wherein the load current monitoring unit mainly comprises a thermal sensing component used for collecting and sensing the internal temperature of the breaker solenoid during operation at different rated currents, and a transparent indication ocular lens, one end of the thermal sensing component is close to the breaker solenoid and is horizontally arranged, the other end of the thermal sensing component is far away from the breaker solenoid and is arranged in a comb-shaped structure, the comb-shaped structure is used for increasing the temperature gradient, revolution portions of the comb-shaped structure away from one side of the breaker solenoid are respectively provided with a temperature color-changing component, and the transparent indication ocular lens is arranged on the breaker casing and is arranged at an outer side of the temperature color-changing component. The breakerload current monitoring device is advantaged in that the load current monitoring function is realized, and a user is facilitated to carry out capacity expansion, intervention and solution for potential overload problems through the prompt and early warning information.