Circuit breaker convenient to install

The invention relates to the field of circuit breakers, and discloses a circuit breaker convenient to install, which comprises a circuit breaker, a fixing plate is arranged on the rear side of the circuit breaker, a fixing rod is installed at the top end of the circuit breaker, clamping arms for clamping the fixing rod are arranged on two sides of the fixing rod, and a first clamping structure is arranged between the two clamping arms. The circuit breaker is provided with clamping plates on two sides of the fixed rod, moving arms are fixedly mounted on the inner sides of the clamping plates, a sliding rod is arranged between the two moving arms, the top end of the sliding rod is connected with an air cylinder for driving the sliding rod to move, the air cylinder is mounted on the fixed plate, and a second clamping structure is arranged between the sliding rod and the moving arms. A groove is formed in the circuit breaker, a heat dissipation plate is installed in the groove, a heat conduction structure is arra