The invention belongs to a linear displacement measuring device, and specifically discloses a multi-station multi-degree-of-freedom high-precision micro-positioning linear displacement measuring device. The device comprises a reference carrier, a measuring clamping structure which is fixed on the reference carrier, a measuring driving structure fixed on the reference carrier, and a multi-degree-of-freedom which is positioned on the reference carrier and can be driven by the measuring driving structure to move relative to the reference carrier; the measuring clamping structure, the multi-degree-of-freedom adjusting device and the measuring driving structure are in the same straight line; the multi-degree-of-freedom adjusting device moves in the straight line direction. With the adoption of the device, the measurement time is reduced, the working efficiency is increased, and the quantity of bought devices and economic cost are saved; the multi-degree-of-freedom adjusting device is convenient to operate, flexible to perform, small in size and high in stability; a high-precision ball screw is used as a connecting device and can effectively reduce the fitting error of the system as well as improving the measurement precision.