The laser feedback technique had the advantage of high sensitivity, which could fulfill the displacement and deformation measurement of targets with black and rough surfaces without the need of cooperative target mirrors. In this paper, in order to eliminate the influences of environment (including air pressure, base vibration, drift in temperature, etc.) on measurement accuracy, steady orthogonally polarized microchip laser was designed and assembled. The orthogonally polarized laser feedback system was built with optical components and electric circuits. The system had capability to achieve long-distance measurement and work in steady state. The system could effectively reduce the influences of environment and improve the accuracy of the laser feedback interferometer.