Because two shearing object beams travel in the same direction when Wollaston prism is used as image-shearing device in traditional speckle shearing interferometry. It is difficult to realize phase-shifting technique by separating the two beams for introducing some additional phase changes between the two beams. Rotating stage phase-shifting method (RSPSM) presented in this paper could introduce additional phase changes by rotating the test object a small angle, which is fixed on a rotating stage. Theoretical analysis shows that RSPSM can introduce a stable and linear additional phase changes. The relationship between rotating angle and additional phase is offered. A typical experiment about RSPSM is carried out by using a centrally loaded clamped circular plate. The experimental results are offered. It shows that rotating stage phase-shifting technique could effectively obtain displacement derivative field from fringe patterns of test object.