Objective To set the cost standards for hospitalization based on the eases of the clinical pathway in order to help set a reasonable ceiling for the expenses of various diseases.Methods The multiple linear regression analysis was applied to find out influencing factors of hospitalization costs of the hysteromyoma.Diagnosis Related Groups(DRGs)ease mix was used to group 1777 hysteromyoma cases.Results The main factors for the expenses,as listed by their influence,were surgical operation or not,disease(s)of concomitance and the amount,adjusted R2 =0.6545.Hysteromyoma patients were divided into four diagnosis related groups; the all coefficient of variation(CV)is as small as 0.068,0.104,0.102,and 0.116 respectively.The hospitalization costs of the hysteromyoma of standard reference value were then calculated.Conclusion The standards interval for hospitalization costs set with DRGs case mix is reasonable and efficient,significantly useful for regulating medical practice and harnessing excessive costs of hospitalization.