In Laser Scanning Display System (LSDS) based on Lissajous pattern, the reconstruction of laser-modulated pixel data stream becomes the key point for the implementation of the system due to the difference between Lissajous scanning pattern and the traditional raster scanning pattern. This paper proposes two methods for laser modulated pixel data stream reconstruction, namely, the pixel-based method and the method of the equal interval sampling of the scanning line. The uniformly-spaced sampling method is easy to implement while the pixel-based method can correct the projective distortion of the system by changing the look-up table. The results of the theoretical analysis are proved by simulation and engineering implementation.