In order to realize precision of the p assive 3D shape measurement technology,a new technology by integral imaging is p roposed in this paper based on the connection of the corresponding points.A ray tracing method is used to analyze the processing of pick-up information by the integral imaging system.The relationship of the corresponding points is shown under the theoretical analysis,which is det ermined by regular lens array in the integral imaging.The coordinate difference between the neighbor corresponding points is the same with each other in an ideal world.This relatio nship is used to screen the points from the elemental images which have bigger errors in the actual optical experim ents,and used to reduce the whole errors of the reconstruction.Optical experiment is done to confirm the feasibility of the proposed method. Optical results show that the length is 500mm which is captured by the proposed method.The relative error is 0.4%. But the same length captured by the conventional method is 502mm whose rela tive error is 0.8%.This self-screening technology increases the precision of the results.This result c onfirms that our proposed method opens a new way for the application of the passive 3D shape measurement technolo gy.