The principles of profilometry with color face-structured projecting grating was introduced in this paper. The sine coded projecting grating was adopted,so that the rapid direct demodulation of grating fringe method could be used to carry out the measurement of single view angle of the object,and a standard step was measured by the method. The reason that caused errors in the measuring process was analyzed,and the corresponding improving method was put forward. Finally,the foot of complex free-form surface was measured by the method,and the results show that the method can obtain the 3D data of the object quickly and accurately.