Automatic cleaning and filtering device of fabricated building material distributing machine

The invention provides an automatic cleaning and filtering device of an assembly type building material distributing machine, and relates to the technical field of cleaning and filtering devices, the automatic cleaning and filtering device comprises a mounting plate, a telescopic air cylinder and a supporting plate, the telescopic air cylinder is arranged on the mounting plate, the supporting plate is arranged at the output end of the telescopic air cylinder, a side plate is arranged on one side of the supporting plate, and an electric telescopic rod is arranged below one side of the side plate; the output end of the electric telescopic rod penetrates through the side plate and is connected with a grabbing block, a rotating block is rotationally arranged in the grabbing block, and the rotating block is driven by a driving part. According to the device, the mounting plate is mounted on a material nozzle of the material distributing machine, an electric telescopic rod extends to convey a grabbing block to a fil