Abstract: Objective To evaluate the hospitalization charges of medical-insured patients with different in-comes, different age and the burdens shared by individuals, to analyze the multiple factors that influence the charges and provide basis for goverment policy making. Method We investigate the medical costs and incomes of 1588 medi-cal-insured inpafients in a Nantong hospital ,study the expenditure burdens and influencing factors of patients with dif-ferent income and different age appling T-test,F-test,and χ2 test. Results There is singificant difference in expendi-ture burdens between patients of different income level ,the expenditure burdens are obviously heavier in group of old age patients than in other age groups. Conclusion It is necessary to reinforce the government functions and perfect the health security system, low income groups should be given more attentions and cares.