The steel bar stress gauge is mainly composed of vibrating wire sensing parts, steel sleeves, connecting rods, cables and sealing components, etc. The sensing part of the steel bar gage is a vibrating wire strain gage. The steel bar meter is connected with the steel bar to be measured by welding or threading. It is used to monitor the stress of geotechnical engineering concrete buildings, suitable for long-term buried in hydraulic buildings or other buildings, and to measure the stress of steel bars inside structures.