Due to the complex and changeable geological environment, uneven thrust, uneven grouting and uneven shield clearance, etc. , There is often a deviation between the actual jacking trajectory of the pipe jacking machine and the expected trajectory during the construction process, and large deviations may cause construction accidents or serious economic losses. Aiming at the above problems, an attitude measurement system based on the combination of a photoelectric sensor array and a PLC is designed in the method of coordinate conversion. A related real-time display interface is developed, which is used for real-time display of the three angle attitudes of the pipe jacking machine. And the projection method is used to calculate the real-time display of the trajectory of the pipe jacking machine to assist the attitude control of the pipe jacking machine. In the experiment, artificially simulate the movement deviation of the pipe jacking machine head to verify the accuracy of the measurement system. Experiments show that the coordinate recognition accuracy of the point source of the laser measurement system is up to 3 mm, the angle measurement accuracy is 0. 1 degree, and the maximum error is about 0. 784 degrees, which meets the requirements of pipe jacking construction, facilitates the attitude measurement of pipe jacking, and improves the quality and efficiency of pipe jacking construction.