The utility model relates to an intelligent gas compensation device of a sulfur hexafluoride breaker. The circuit breaker comprises at least one circuit breaker body. The compensation device comprises a gas storage tank internally provided with a gas pumping-in/out system, and a controller, wherein the gas storage tank and the circuit breaker bodies are connected by a conduit, and the controller is electrically connected with the gas storage tank and used for controlling the gas pumping-in/out system inside the gas storage tank. The compensation device ensures that running equipment does not suffer from problems such as low-temperature alarm and lockout. Meanwhile, the device has a variety of practical functions such as a circuit breaker body pressure field display and background monitoring function, intelligent pressure adjustment functions like body micro-leakage gas compensation and automatic gas leakage under high temperature, and a SF6 gas leakage reminding function.