The invention relates to an integral residual current circuit breaker. A transformer placing cavity for placing a transformer of a residual current detection part is arranged in a position, between an assembly cavity and an outlet terminal mounting seat, on a shell. A bimetal sheet adjustment platform is formed above the transformer placing cavity of the shell. The bimetal sheet adjustment platform is provided with an observation window and an adjustment window. The observation window passes through the bimetal sheet adjustment platform. The observation window corresponds to a position of matching between a bimetal sheet and a lock catch in an L-pole electromagnetic tripping device. An adjustment screw is installed in the adjustment window. The adjustment platform is covered with a sealing cover. Compared with the prior art, the integral residual current circuit breaker has the advantages of compact structure, convenient and reliable bimetal sheet position adjustment operation, easy installation, and easy bimetal sheet adjustment and repair.