In　the　current　field　of　face　reconstruction,　the　methods　of　face　reconstruction　tend　to　pay　more　attention　to　the　optimization　of　the　face　model,　and　seldom　study　the　surface　details　or　even　the　skin　realism,　which　leads　to　the　greatly　reduced　realistic　of　the　model　and　can　not　achieve　good　application　effect.　In　this　paper,　we　improve　the　quality　of　normal　map　to　lay　the　foundation　for　the　realistic　face　reconstruction.　Based　on　the　existing　face　reconstruction,　the　normal　mapping　of　the　object　surface　is　reconstructed　by　image　pre-processing　and　photometric　stereo　technology　for　face　photos　with　the　same　angle　and　different　illumination　directions.　This　paper　improves　the　photometric　stereo　algorithm　to　improve　the　efficiency　and　effect　of　normal　mapping.　©　2021　IEEE.