The invention discloses an assembling unit of a detachable wall and a detachable camber beam of an electric room of a haulage motor. The assembling unit includes a partition and a camber beam, wherein a current transformer cabinet is mounted at the inner lower part of the electric room of the haulage motor; a brake resistor is mounted at the inner upper part of the electric room of the haulage motor, and is mounted in a U-type groove; the U-type groove is mainly formed through assembling and welding a steel underframe and a half steel wall; the middle part of the U-type groove adopts a detachable structure; the half steel wall mainly comprises fixing walls on the two sides and a middle detachable wall; the detachable wall and the fixing walls are connected through connecting bolts; the detachable camber beam is arranged at the upper parts of the fixing walls; the two ends of the detachable camber beam are connected with the side walls at the tops on the two sides of the electric room of the haulage motor; the cross section of the detachable camber beam is a U-type beam with an upwards opening; sealing adhesive tapes are arranged on two vertical standing plates of the U-type beam. The wall body of the electric room of the haulage motor and the camber beam adopt detachable structures, the entire structure is simple and reasonable, and the mounting and disassembly are relatively convenient.