A new pixel matching method is proposed based on one-Dimensional empi rical mode decomposition(1D-EMD) and applied to the on-line 3D shape measurement.Firstly ,a fixed sinusoidal grating fringe pattern generated by computer is projected onto the measured object surfa ce by a digital light processing (DLP) projector.The object on pipe-line movement will produce equivalent phase shifting.Then a CCD camera with any step captures five frames of fringe patterns modulated by the object′s surface shape.Due to the movement of the measured object,this makes the points in these deformed fringes not be o ne-to-one corresponding.The pixel matching must be done.In this paper,the five deformed patterns are decom posed with 1D-EMD method,and we can obtain the mode distribution which is consistent with the object′ surface s hape.And then Otsu algorithm is used to make the binarization.The area with higher reliability is segmented to be regarded as a template to realize the pixel matching.And the phase shifting algorithm with fine unequal steps is u sed to reconstruct the surface information of the measured object.The simulations and experiments prove the fe asibility of this method.