Tool for measuring form and location tolerance of conical screw shaft paddle

The utility model discloses a tool for measuring form and location tolerance of a conical screw shaft paddle, which comprises a base, dovetail grooves are respectively arranged on the outer end faces of two long edges of a rectangular frame, arc-shaped concave sections are respectively arranged in the middle parts of two short edges of the rectangular frame, the outer walls of the arc-shaped concave sections are respectively connected with central brackets, and dovetail grooves are also arranged at the tops of the central brackets; the cylindrical rollers are arranged at the centers of the bottoms of the two arc-shaped sunken sections in pairs to support the two ends of the spiral shaft in a rolling manner; the L-shaped sliding ruler and the horizontal sliding rod are inserted into the dovetail groove of the central bracket; the ejector pin sliding block is sleeved and fixed on the vertical ruler of the L-shaped sliding ruler, and the tip of the ejector pin sliding block abuts against the center of the end of