In order to study the impact of atmospheric turbulence on the imaging polarization detection of space targets, this paper constructed a simulation analysis model and focused on analyzing detection deviations of degree of linear polarization caused by the atmospheric turbulence. By simulating the time-sharing and simultaneous polarization imaging method, it is found that atmospheric turbulence has obvious influence on the imaging polarimetric measurement accuracy, which impacts the time-sharing imaging polarization method more obviously. And the impact resulting from atmospheric turbulence can be significantly reduced by using the adaptive system to correct partial low order aberrations. For balancing the imaging signal-to-noise ratio and the measurement accuracy of the imaging polarimetry, an improved polarization imaging method which combining with time-sharing and simultaneous imaging method was proposed. The influence of atmospheric turbulence on this method is larger than the simultaneous method slightly. But the proposed method can achieve a better imaging signal-to-noise ratio. Then from simulating and analyzing, it is found that multi-frame images combination method can reduce the deviations of polarimetric measurements under influence of atmospheric turbulence effectively, especially for time-sharing polarization imaging method.