The invention discloses non-contact measuring equipment for radial deformation of a submarine cable, which belongs to the field of submarine device testing and is used for scanning the contour of thesubmarine cable and accurately measuring the radial deformation of the submarine cable. The non-contact measuring equipment comprises a lifting table and two sets of identical scanning devices, wherein each set of scanning device comprises a fixed plate, a guide rail, a driving device and two sensors; the two sets of identical scanning devices are symmetrically arranged on both sides of the lifting table to realize full contour scanning of a submarine cable to be measured; the lifting table can be adjusted according to the position of the submarine cable in an experiment in order to adapt to the experimental environment; the driving device can output a relatively low revolving speed to ensure adequate scanning time; and a ball screw guide rail can meet the requirement of experimental accuracy in a relatively economical way. The contour of the submarine cable is scanned through the cooperation of multiple sensors, so that the radial deformation of the submarine cable is measured accurately, which is of great significance to the stiffness analysis of the submarine cable.