The invention relates to a remover, in particular to a wall corner mud remover for constructional engineering. Thus, in order to solve the technical problems, the wall corner mud remover which can replace manpower to crack and remove a mud block, saves labor and can also prevent dust from affecting the surrounding environment is provided. According to the technical scheme, the wall corner mud remover comprises a bottom plate, wheels, a 7-shaped plate, a brush, a balancing weight, a top plate, an installing plate, a shell, a rotating shaft, a big gear, a connecting rod, a driving motor and thelike. The wheels are symmetrically installed on the left side and the right side of the bottom of the bottom plate, the balancing weight can be more stably installed in the middle of the top of the bottom plate, and the 7-shaped plate is fixedly connected with the left side face of the bottom plate. By moving the device to the side of the wall, moving a cracking block to the upper side of the mudblock and starting the driving motor, the cracking block can be moved up and down to crack the mud block, there is no need to manually shovel away the mud block through a shovel, labor is saved, and work efficiency is higher.