Abstract: Objective To study the influence of facial width/length ratios and profile convexity changes on the facial esthetics in male individuals.Methods Threedimensional photo from respectively facial and lateral views of male individuals was selected,which conformed to the aesthetic standards.With Adobe Photoshop CS5 software,male facial width/length ratios from bilateral temporal zygomatic area to mandibular angle were changed into 58%,60%,62%,64%,66%,with changes in widths respectively -2,-4,0,2,4 mm.According to aesthetic plane through the line connecting pronasale and pogonion as the aesthetic standard,profiles was changed into three types:sag,normal and protruded.Match facial images and profile images into 15 groups,and give them to 20 orthodontic doctors for determining VAS scores in the form of questionnaire survey.Data were inputed into SPSS17.0 statistical software and stastically analyzed by 2factor factorial design ANOVA.Results For sag profile,when facial width/length ratios increased,the VAS score decreased; when profile was normal and facial width/length ratio was 62%,the VAS score was the highest (P<0.01); when profile protruded,the VAS scores ranged from high to low by facial width/length ratio:64%> 62%> 66%> 60%>58%(P<0.01).When width/length ratios were 58%,60%,62%,VAS scores′ rank was:normal profile>protruded profile>sag profile.When width/length ratios were 64%,66%,VAS scores′ rank was:protruded profile> normal profile>sag profile(P< 0.01).Conclusions The facial width/length ratio and profile have significant effects on the facial esthetics,and they should be taken into consideration in clinical orthodontic practice.