Building mortar mixing device

The invention provides a building mortar mixing device. The building mortar mixing device comprises a stirring barrel, a motor, a mixing stirring assembly, a crushing stirring assembly and a material distributing plate assembly, so that a crushing cone is arranged in the stirring barrel, and stirred materials inside the stirring barrel can be in contact with the crushing cone to achieve a crushing effect when moving downwards, the condition that the material forms a block at the inner bottom end of the stirring barrel to block a discharging pipe is prevented, and the effect of avoiding influencing the flowing-out of the materials is achieved. According to the building mortar mixing device, a material distributing plate and a discharging hole are arranged in the stirring barrel, so that the raw materials can be primarily screened after entering the stirring barrel, and the situation that large raw materials directly enter the stirring barrel and are non-uniformly stirred is prevented; and meanwhile, transverse