The invention discloses a three-dimensional measurement shadow removal method based on sequential logic edge detection. The method comprises steps of acquiring a raster projection image including a shadow area, wherein the shadow area is an camera imaging area generated by shielding a raster light source with a side of an object to be measured away from the raster light source; performing N-step phase shift to obtain N raster projection image as a phase shift map by the projection of a projector and the capture of a camera, and presetting height jump and discontinuity thresholds; obtaining a wrapped phase map by a synthesizing process, traversing all pixels according to a sequential logic state table, initializing respective variables of the sequential logic before traversal, recording positive or negative jump as the two external input values of the sequential logic, and determining the next-state values of respective pixels according to the external input value and the current-statevalue. After the three-dimensional measurement on a raster projection method, the shadow phase distributed at the edge of a three-dimensional entity contour is effectively removed, and the accuracy ofthe three-dimensional shape measurement based on the raster projection method is improved.