Auxiliary position detection device

The utility model provides an auxiliary position detection device, which comprises a flat plate, a Z-direction pin positioning seat positioned at the central position of the flat plate, an X-direction pin positioning seat positioned on the right side of the Z-direction pin positioning seat, a Y-direction pin positioning seat positioned above the Z-direction pin positioning seat, a Z-direction positioning pin, an X-direction positioning pin and a Y-direction positioning pin which are respectively mounted corresponding to the three pin positioning seats, wherein the Z-direction positioning pin determines a plane reference; the Y-direction positioning pin determines a direction reference; and the X-direction positioning pin determines a center reference. The auxiliary position detection device has the beneficial effects that the unreliable cast reference is converted into the reliable and stable plane reference; the influences of the surface roughness and the surface unevenness of a cast on reference establishme