Abstract: This paper has developed an approach of rotating the baseline to solve the key technical problem lying in the process of orientation determination by Beidou satellites’ carrier phase-identification of the original phase integer ambiguity, and the simulation result shows that the azimuth determination precision of 0.01° by a 2-meter-long baseline during 5 minutes can be achived when the non-difference phase measurement precision is better than 2 percent of a cycle.