Cement mortar joint filling device

The utility model discloses a cement mortar joint filling device, and relates to the field of roads and bridges. A cement mortar joint filling device comprises a device body and a support. The device main body is embedded into an inner cavity of the bracket; the device main body is detachably connected with the bracket; the device main body is divided into two parts, the upper part of the device main body is a cover body, and the lower part is a cavity; a main shaft is arranged in the cavity; the main shaft is installed at the center position in the device body through a fixing rod. The fixed rod is arranged at the lower part of the main shaft; the scrubbing brush and the rotating blade are arranged, the transmission gear set drives the main shaft to rotate under the action of the rotating motor, the rotating blade is driven to stir cement mortar in the cavity and prevent the cement mortar from being coagulated into blocks, and the scrubbing brush rotates in the wall to prevent the cement mortar from being co