Pressing plate joint angle detection tool

The invention provides a pressing plate joint angle detection tool. The pressing plate joint angle detection tool comprises a measuring graduated scale module, an angle measurer, a clamping device and a rotating bearing, the measuring graduated scale module is of a cuboid structure which is hollow and is an elliptic cylinder; a measuring graduated scale is marked on the front side of the measuring graduated scale module and on the outer side of the hollow oval edge; the angle measurer is of a hollow first elliptic cylinder structure, and sawtooth-shaped stripes are arranged on the inner side of the first elliptic cylinder structure; the radius of the outer ring of the first elliptic cylinder structure is smaller than the radius of the hollow elliptic cylinder of the measuring calibrated scale module. The length of the angle measurer is the same as the width of the measuring graduated scale module; the clamping device is of a second elliptic cylinder structure with a first groove in the middle, and the outer r