Device and method for measuring bending radius of cable

The invention discloses a device and a method for measuring the bending radius of a cable. The cable bending radius measuring device comprises a clamping mechanism, a positioning mechanism and a measuring mechanism. The number of the clamping mechanisms is two, each clamping mechanism comprises a transverse plate and two clamping plates connected with the transverse plate in a sliding mode, the transverse plate is provided with first scale marks in the length direction of the transverse plate, the two clamping plates are distributed in the length direction of the transverse plate at intervals, and the distance between the two clamping plates is adjustable. Each positioning mechanism comprises two positioning plates which are distributed in parallel at an interval and a connecting plate used for connecting the two positioning plates, the positioning plates are in sliding connection with the transverse plates in the corresponding clamping mechanisms, the positioning plates can selectively ascend and descend rel