The design and implementation of a GaN-based UV digital pixel photoelectric sensor for high speed and high performance is presented.The pixel occupies an area of 50 μm×50 μm and includes a UV photodiode,a 1-bit comparator and a 3 T memory cell.In the sensor the A/D conversion can simultaneously be performed for all pixels.An automatic reset circuit is introduced in each pixel comparator circuit and it can increase the peak signal to noise ratio and dynamic range by digital correlated double sampling operation.The DPS ADC circuits are implemented by CSMC DPTM 0.5 μm CMOS process,and the initial function test results verify that the digital sensor can work properly.