Objective To discuss the correlation between the incidence and hospitalization of viral hepatitis patients and twenty four solar terms. Methods Retrospective analysis was conducted in 20 Class A Tertiary Hospitals nationwide from February 2008 to January 2011 in patients with first diagnosis as viral hepatitis. Gender

age

diagnosis

the solar term on incidence were extracted from hospital information system（ HIS） and then standardized.Radar chart was adopted to inspect the distribution of incidence and hospitalization time on different solar terms.Results Totally 40 681 cases were collected. There were 37 378 patients with gender records in which 26 744 males（ 71. 55%）

and 26394 patients with age records in which 13330 patients（ 50. 50%） were aged from 18 to 44

and8213 patients（ 31. 11%） from 45 to 59. Diagnosis were mainly viral hepatitis B and chronic hepatitis B. There were37 650 patients with solar term records and hospitalization occurred on the Summer Solstice

Slight Heat and Great Heat took 5. 46%

6. 07% and 5. 28% respectively

which were higher than other solar terms. Conclusion The Summer Solstice

Slight Heat and Great Heat were high-incidence solar terms for viral hepatitis so prevention should be emphasized on these three solar terms.