Continuous casting mold centering measurement device

The utility model relates to a continuous casting mold centering measurement device, which has the technical scheme that the mounting plate (18) of the device is fixed on a shell (13) in a sliding device (6); the lower plane of the mounting plate (18) is vertical to the centre line of the shell (13); the mounting plate (18) is fixed on the platform of a support adjusting rack (7) through a bolt; a detection rod (5) and a worm wheel (16) are connected through a screw thread and are concentrically arranged in the shell (13); the lower end of the detection rod (5) is provided with a sensor (1); and the sensor (1) is connected with a digital display meter (9) through a cable (10). The use method of the device comprises the following steps: moving the detection rod (5), measuring the distance L2 between an outer side foot roll and the sensor (1) through the sensor (1), then measuring the distance L1 between an outer side support roll (12) and the sensor (1), and respectively selecting the minimum values of L1 and