The invention provides a relay cover for a compressor. The relay cover comprises a relay casing, a relay stand, an operation capacitor and a starting capacitor, the rear portion of the relay casing isin clamp connection onto the relay support, the lateral part of the relay casing is provided with a first vertical clamping member, and the upper portion of the relay casing is provided with a secondhorizontal clamping member. The operation capacitor is provided with a claw, and the claw can be clamped into the first vertical clamping member vertically so that the operation capacitor is in clampconnection to the first clamping member; and a trapezoid claw is arranged under the starting capacitor so that the trapezoid claw can be horizontally clamped into the second clamping member and the starting capacitor is in clamp connection onto the second clamping member. Clamping plates on the relay support are in clamp connection with clamping groove assemblies in the relay casing respectively,so that the relay casing is connected with the relay support more conveniently, and the firmness is not reduced; and the relay casing is provided with the first and second clamping members, so that the operation capacitor and the starting capacitor are fixedly connected to the relay casing, and mounting and dismounting are convenient rapid.