Objective:　To　study　the　effect　of　residual　strains　on　the　distribution　of　circumferential　stresses　and　strains　of　normal　arterial　wall.　Methods:　The　numerical　application　method　of　residual　strain　was　constructed.　The　stresses　and　the　strains　of　arterial　wall　under　different　physiological　blood　pressures　were　calculated.　The　opening　angle　of　arterial　wall　was　simulated.　Results:　The　residual　strains　resulted　in　the　circumferential　stress　level　falling　markedly　and　the　circumferential　strain　distribution　along　wall　thickness　going　even;　The　opening　angle　of　artery　circle　was　estimated　7　degrees.　Conclusions:　Residual　strains　reduced　stress　level　at　the　loaded　state;　Residual　strains　changed　circumferential　strain　distribution　along　wall　thickness　at　the　loaded　state　directly;　Residual　strains　made　blood　vessel　circle　open　at　the　non-loaded　state;　The　optimization　state　of　blood　vessel　wall　embodied　uniform　strain　optimization　criterion.