An optimized polarization phase-shifting method in digital speckle pattern interference based on a single polarization analyzer is proposed to solve the problems of complex structure and inconvenient operation of temporal polarization phase-shifting for digital speckle pattern interferometry［1］.Different from the former method which requires two sets of fixed wave plates and movable polarization analyzers;this method only needs one set of fixed wave plate and movable polarization analyzer to achieve the phase shifting.Therefore,the system structure and operation process are simpler,and the error of phase shift caused by inaccurate optical path adjustment is minimized,leading to higher-quality phase maps.Experimental results show that the digital speckle pattern interferometry with polarization phase shift based on a single polarization analyzer,combining with the traditional three-,four-,five-step phase-shifting algorithms,is able to obtain high-quality phase maps,verifying that the proposed method is an effective alternative of the former method.