Prefabricated part assembling auxiliary positioning device

The utility model provides a prefabricated part assembling auxiliary positioning device which comprises a fixed vertical plate and a hollow base, the lower portion of the fixed vertical plate is connected with the hollow base, a height adjusting plate is arranged above the fixed vertical plate, the right side of the height adjusting plate is connected with a positioning plate through two connecting rods, and a rear outer frame is installed in the middle of the upper portion of the back face of the positioning plate. A positioning plate is arranged in the rear outer frame, a vacuumizing pump is fixed in the middle of the rear outer frame, four suction cup holes are formed in the right side face of the positioning plate, and a vacuum suction cup is installed in each suction cup hole. And by arranging a plate cavity, a height adjusting plate, a telescopic adjusting rod, a sliding guide groove and a linear sliding strip, the assembly height needed by the fixed prefabricated part can be adjusted according to diffe