With the method of non-experimental assessment research of epidemiology， by viewing the reformation as the intervention and dividing observation group and control group， the study makes some statistics about the variables related to the quality of applicants for a medical college after and before the reformation. The conclusion is: the reformation may be one of the causes that appeals to applicants from reformed class to the non-reformed class； the reformation is a risk factor to the non-reformed class（may cause the quality of applicants down） while the reformation is a protective factor to the reformed class（help raise the quality of applicants or avoid slipping down too fast）.