In order to unwrapped the phase principal value of grating projection p hase profilometry conveniently and reliably,a phase unwrapping method based on regularized bar pattern is proposed.This method assigns the period number infor mation to the regularized auxiliary bar pattern,which is projected to the surfa ce of the object and synchronously collected by the digital camera,and then thr ough analysis and processing,to assist the unwrapped of the phase principal val ue.The gray distribution of the auxiliary pattern is determined by analyzing th e jump rule of the phase principal value, forming a regular bar auxiliary patter n,projecting it to the surface of the object,under the same modulation effect as the phase field,and then according to the gray distribution,the period numb er information can be solved to guide the unwrapped of the phase principal value .At the same time,the adjustment method of the period number near the jump pos ition of the phase principal value is given.The whole measurement process only needs to project an additional pre programmed strip auxiliary pattern.Simulatio n and real experiments show the feasibility and reliability of this method.Comp ared with the traditional method,this method takes into account the speed and r eliability of phase unwrapping.