Objective： To study the present situation of comorbidity in senile patients and the relationship between Chinese medicine syndrome type the present situation and comorbidity.Methods：Retrospectively analyzed the hospitalization data of 722 cases of patients who met the inclusion criteria，discussed the incidence of comorbidity，prevalence of diseases with high incidence，relationship among Chinese medicine syndrome types and relationship of each index above with age and gender of senile patients.Results： (1)Diseases with top 10 prevalence were arteriosclerotic disease(641 cases)，hypertension(502 cases)，diabetes(268 cases)， degenerative spinal disease(399 cases)， dyslipidemia(329 cases)，prostate lesions(323 cases)，coronary heart disease(244 cases)，cerebrovascular disease(255 cases)， infectious disease(177 cases)and osteoporosis(107 cases).The prevalence of arteriosclerosis， hypertension， coronary heart disease， cerebrovascular disease infectious disease and osteoporosis was higher as age increased(P ＜ 0.01)，the prevalence of dyslipidemia was lower as age increased(P ＜ 0.01)， the prevalence of 4 types of disease including arteriosclerosis， coronary heart disease，cerebrovascular disease and infectious disease in male was higher than that in female(P ＜ 0.01)，and the prevalence of degenerative spinal disease and osteoporosis in female was higher than that in male( P ＜0.01).The diagnostic rate of senile problems was lower than the actual incidence.(2)Divided patients into 7 simple syndrome types，including blood-stasis type(646 cases)， qi-deficiency type(526 cases)， phlegm-turbidity type(509 cases)， yin-deficiency type(126 cases)，kidney-deficiency type(119 cases)，dampness-evil type(116 cases)and excessive-heat type(71 cases).Among the simp le syndrome types，the blood-stasis type，qi-deficiency type and phlegm-turbidity type made up the highest proportion.The incidence proportion of qi-deficiency syndrome was lower as age increased，and among the comorbidity of 3 syndrome types of yin deficiency，kidney deficiency and dampness evil，the proportion of patients at age from71 to 80 years old was the largest，differences being significant(P ＜ 0.05).Among patients of qi-deficiency type，the proportion in female was higher than that in male，among the other single syndrome types，the proportion in male was higher than that in female，and there was significant difference being found in the yin-deficiency syndrome and the excessive-heat syndrome( P ＜0.05).(3)There were no significant differences being found in the prevalence of common diseases among various syndrome types.Conclusion：The most common disease of hospitalized senile patients is arteriosclerotic disease，and the diagnostic rate of senile problems is far lower than the actual incidence.Among the hospitalized senile patients，the single syndrome types of qi deficiency， turbid phlegmand blood stasis make up the majority， and the prevalence of blood-stasis syndrome is the highest，indicating that qi deficiency，turbid phlegmand blood stasis are the pathogenic basis of various diseases of senile patients.