The invention relates to the technical field of mortar processing, and discloses a self-variable anti-sticking wall mortar mixing device, which includes a support frame, a cantilever is movably connected to the top of the support frame, and a two-way screw rod is movably connected to the inside of the cantilever , the top of the two-way screw rod is fixedly connected with a transmission wheel, the outside of the two-way screw rod is fixedly connected with a main gear, the outer meshing connection of the main gear is connected with a transmission gear, and the bottom of the transmission gear is hinged with a steering block, The flywheel is hinged at the bottom of the steering block. Through the combined use of two-way screw, fly wheel, speed change wheel, screw slider, guide rod and gear column, it is possible to drive the stirring rod and anchor frame wheel to rotate at a periodic change in speed, effectively improving the stirring effect and improving Stirring speed, so as to ensure the processing efficiency of the mortar mixing process, effectively ensure the uniform mixing of the mortar, ensure the quality of the mortar, and thus ensure the use effect of the mortar.