The utility model discloses a measurement device for precision is high for subway, including the measuring tool, the portrayal is scaled on the top outer wall of measuring tool, and the welding has asecond spout on the bottom outer wall of measuring tool, the welding has the toolbox on one side outer wall of measuring tool, and the welding has a support column on the top outer wall in toolbox, the welding has the control box on the top outer wall of support column, and has a control panel through the bolt fastening on one side outer wall of control box, sliding connection has the movable pulley that the equidistance distributes on one side outer wall of second spout, and the equal sliding connection in position that the second spout was kept away from to movable pulley one side outer wallhas two first spouts. The utility model provides artificial error has been avoided in the high mechanization of device to improved measurement of efficiency, reduced work personnel's operating time,shortened the time limit for a project greatly, improved the practicality of device, avoided because of the uneven error that leads to of railway, strictness when according with the rail and measuring, convenient and fast.