Objective:To expiore the distribution of periodontal biotypes and relate anatomic parameters in maxillary anterior teeth,including crown width/crown length ratio(CW/CL),gingival papilla height(PH)and attached gingival width(AGW),in Han population in Jiangsu Province.Methods:A total of 108 periodontal heathy Han volunteers (52 males and 56 femals)in Jiangsu Province were included.Three kinds of periodontal biotypes,thin-scalloped,thick-scalloped and thick-at,were assessed according to transparency of periodontal probe through gingival margin in maxillary central incisor and some related anatomic characteristics.In addition,CW/CL,PHand AGW of maxillary anterior teeth were also analyzed.Results:In Han population in Jiangsu province,30%persons were thin-scalloped type,51% were thick-flat type,and only 19% were thick-scalloped type.Mean CW/CL in Han population was 0.84±0.09,mean AGW was(4.80±1.39)mm,and mean PH was(3.93±0.80)mm.CW/CL and AGW in thick-flat biotype were singnificantly higher than those in thick-scalloped and thin-scalloped(p<0.05) ,while PH in thick-flat biotype was singinficantly lower than that in the other two biotypes(p<0.05).Conclusion:The most popular periodontal biotype in Han population in Jiangsu Province is thick-flat biotype,which is the biotype with lower aesthetic risks.Differences in CW/CL,PH and AGW do exist in different periodontal biotypes.