Radian detecting device

The invention relates to the technical field of a detecting device, particularly to a radian detecting device comprising a pedestal, a positioning member, a proportional amplifying mechanism, and a digital display radian instrument. The positioning member installed on the pedestal is used for supporting a to-be-detected workpiece. The proportional amplifying mechanism includes a measuring rod thatcan rotate relative to the pedestal. The measuring rod has a measuring end and a pressing and abutting end; the measuring end can be in contact with the lower surface of the to-be-detected workpiece;and the distance between the pressing and abutting end and a rotating supporting point is larger than the distance between the measuring end and the rotating supporting point. The digital display radian instrument is used for realizing the contact with the pressing and abutting end; and after the to-be-detected workpiece applies forces on the measuring end, the pressing and abutting end is drivento apply forces on the dig