Objective To explore the admission style of psychotic patients in psychiatric hospital after Mental Health Law issued. Methods Totals of 313 psychotic inpatients in Chongqing Mental Health Center from May 1， 2013 to April 30， 2016 were assessed by self-made questionnaire. Results In all patients， 128 （40.9%） were voluntary admission， while 185 were involuntary admission（ 59.1%）. Clinical diagnosis， insight and attitudes toward treatment were statistically significant between two groups（ P＜0.01）. Proportion of severe mental disorders were significantly higher in involuntary admission group（ P＜0.01）. Logistic regression showed that treatment attitude（ OR=3.213，95%CI=1.657-6.300，P＜0.01） was influencing factor of involuntary hospitalization. Conclusions Involuntary hospitalization is the major admission style of psychotic patients after Mental Health Law issued. Treatment attitude may have an impact on it.