Objective To analyze the distribution of Chinese medical syndrome in ordinary psoriasis.Methods The pertinent articles on ordinary psoriasis were collected in Chinese Biomedical Literature Database（CBM）

Chinese Academic Journal FullText Database（CAJFD） and Traditional Chinese Medicine Database System（TCMDS） from 1979to 2010.The articles on Chinese medical syndrome were selected and syndrome denomination database was established by Excel.Frequency statistic method was used to analyze the syndrome distribution.Results Totally 920qualified articles were selected and the frequency of syndrome occurrence was 2 033.The distribution of syndrome was sorted by the frequency i.e.the percentage of syndrome occurrence in all articles.There were 9syndromes which percentages exceeded 1%

accounting for 95.97% of all syndromes.The syndrome sequence related to frequency was as following : blood heat syndrome 32.86%

blood dryness syndrome 23.56%

blood stasis syndrome 19.43%

wind heat syndrome 6.34%

damp syndrome 4.87%

blood deficiency syndrome 3.30%

heat syndrome 2.51%

wind damp syndrome 1.72%and bowel and visceral deficiency syndrome 1.38%.The top three syndromes i.e.blood heat syndrome

blood dryness syndrome and blood stasis syndrome constituted 75.85%.Conclusion The syndrome differentiation of ordinary psoriasis is mainly based on blood aspect.The main syndromes are blood heat syndrome

blood dryness syndrome and blood stasis syndrome.