Positioning structure for engineering surveying and mapping

The utility model belongs to the field of measuring instruments, and particularly relates to a positioning structure for engineering surveying and mapping, which comprises a placing plate, an adjusting mechanism is fixedly connected above the placing plate, the adjusting mechanism comprises a fixing plate, a fixing screw, a clamping cylinder and an electric push rod, the fixing screw is movably connected inside the fixing plate, and the clamping cylinder is fixedly connected inside the fixing plate. A clamping cylinder is fixedly connected to the lower portion of the fixing plate. Operation, use and fixation are carried out through a placing plate, during use, an internal adjusting mechanism can be operated to place and fix equipment, a detector can be directly held to place and fix the interior of a fixing plate, then an internal fixing screw is rotated to carry out positioning and fixing, and meanwhile, an internal electric push rod can be used for carrying out height lifting adjustment; the height of the d