Measuring instrument with stable supporting structure for engineering management

The utility model discloses a measuring instrument with a stable supporting structure for engineering management. The measuring instrument comprises a supporting frame, a fixing block and a measuring instrument body. Through cooperative use of the supporting frame, the fixing block, the measuring instrument, the positioning mechanism and the transmission mechanism, after the transmission mechanism drives the positioning mechanism to move to a proper position, the measuring instrument is in butt joint with the fixing block, the transmission mechanism is loosened, the positioning mechanism can fix the measuring instrument while resetting, and assembling of the measuring instrument is completed; the problems that a plurality of threaded assemblies need to be used for connection and fixation in the existing process of assembling the measuring instrument with a supporting frame, so that the measuring instrument cannot be quickly and stably fixed with the supporting frame in the process of assembling the measuring