Multifunctional wall surface treatment device

The invention relates to the field of building construction equipment, in particular to a multifunctional wall surface treatment device. The multifunctional wall surface treatment device comprises a moving mechanism, a treatment mechanism, telescopic plates and a processing belt. The treatment mechanism comprises a working box, a plurality of telescopic plates sliding at equal intervals form a telescopic plate set in the working box, one side of each telescopic plate is provided with magnetic parts penetrating through the working box, and the magnetic parts are in sliding fit to form a deformed magnetic surface; the processing belt is attached to the magnetic surface and comprises a trowelling section and a polishing section; a first winding roller and a second winding roller are arranged on the two sides of the telescopic plate side by side; the two sides of the processing belt penetrate through the strip-shaped grooves in one side of the working box respectively to be wound on the first winding roller and t