The theory of retroreflector array used as pseudophase conjugator was presented. The simulation about the ability that Hartmann-Shack wavefront sensor reconstruct wavefront was done when Hartmann-Shack wavefornt sensor was affected by outline of single retroreflector and the beam-size reduced error of wavefront sensor etc. The circular retroreflector array possessed relatively better wavefront fidelity. Meanwhile the reconstruction precision of Hartmann-Shack wavefront sensor was analyzed when it was affected by its surface shape error and the correction method was presented.