The invention discloses a relay module convenient for disassembling and assembling. The relay module comprises a relay module body, wherein a mounting base is arranged below the relay module body, a mounting groove is formed in the top part of the mounting base, a fixing base is arranged in the mounting groove, the fixing base is in contact with one side inner wall, away from the relay module body, of the mounting groove, a transmission module for fixing the relay module body is arranged on the fixing base, the transmission module comprises a sliding groove formed in the top part of the fixingbase, two sliding blocks are symmetrically mounted in the sliding groove in a slided manner, the top parts of the sliding blocks extend out of the sliding groove, the top part of each sliding block is connected with a connecting rod in a rotated manner, and the bottom part of the relay module body is fixedly provided with a supporting block. Through cooperation of the transmission module and a locking module, the relay module body can be disassembled and assembled quickly and conveniently, thereby facilitating the overhauling, maintenance or replacement of the relay module body for the worker, and improving the overhauling and maintenance efficiency of the worker.