Crack width change monitoring device

The invention provides a crack width change monitoring device, and relates to the technical field of monitoring devices. The crack width change monitoring device comprises a bottom plate, universal wheels are fixedly connected to the lower surface of the bottom plate, and a supporting rod is fixedly connected to the upper surface of the bottom plate. According to the device, the mounting plate, the sliding groove, the sliding block, the clamping pad, the universal wheels, the solar panel, the lighting lamp tube and the adjusting motor are arranged, the sliding block is matched with the fixing sleeve, the monitoring probe can be clamped and fixed, manual hand holding is not needed, labor is saved in use, meanwhile, the universal wheels enable the whole device to move freely, the monitoring range is enlarged, and the monitoring efficiency is improved. The solar panel can convert solar energy into electric energy, the electric energy is provided for the illumination lamp tube, energy is saved in use, meanwhile,