In order to improve the grayscale level and resolution of the micro display on silicon, and maintain pixel grayscale linearity at the same time, the study of digital and analog hybrid scan strategy is proposed with the advantages of analog amplitude modulation and digital pulse width modulation. The subspace weight-bit scan algorithm and its effect of improving the scanning efficiency are introduced. Then, the bit and grayscale modulation of the digital and analog hybrid scan strategy are introduced, and a 256-level grayscale case is deduced. The result shows that the method can reduce the data transfer frequency effectively and this advantage becomes more obvious with the increasing of the grayscale and resolution. In the case of 256 grayscale and 1920 pixel×1080 pixel resolution, the required data transfer frequency can be reduced to 52.49 MHz, the scanning efficiency is 92.58% and the linearity keeps at 100%. This method reduces the required data transfer frequency and the requirement of the display device.