The invention discloses a rotary sandblasting workbench for rotary vibration screen frame and bottom barrel workpieces. A base disc with a rotary shaft is mounted in the center of a support. A pole shore connected with the support is welded to the disc face of the base disc. A shaft hole with the rotary shaft is machined in the center of the disc face. One end of the rotary shaft is assembled to a center shaft hole in the back face of a rotary platform plate through a shaft sleeve. The other end of the rotary shaft penetrates an upper bearing seat and a lower bearing seat and is located and mounted in the base disc shaft hole. A center shaft hole in the front face of the rotary platform plate is sealed with a cover plate. The rotary platform plate is a disc. Supporting main arms are fixedly arranged on the disc face of the disc. One end of each supporting main arm is welded to the edge of the center of the rotary platform plate. The other end of each supporting main arm is connected with an extension arm through a pin shaft. Positioning holes are distributed in the supporting main arms and the extension arms. By the adoption of the technical scheme, the problems that vibrators are not neatly placed and the occupied space is large can be well solved, and the working environment of a workshop can be improved.