An improved temperature compensation method based on software compensation combined with constant current source compensation was studied. Hardware circuits were used by this study,such as single-chip microcomputers, constant current sources, digital temperature sensors and multipliers to optimize traditional software compensation.The compensation effect was better than traditional constant current.The source compensation has been significantly improved, and the overall "temperature drift" has dropped about 13.7 %. The traditional temperature compensation methods,such as thermal element compensation, constant current source compensation and software compensation,were also supplemented. It was of great significance to improve the accuracy of Hall current sensors and meet the actual production requirements.