Compared with type 1 acute MI group, the group of type 2 acute MI smoking rate was higher (52.8% versus 34.9%, p = 0.032); GRACE risk score higher average (151.9 ± 22.2 versus 106.5 ± 25.9, p <0.001); some comorbidity such as anemia (28.4% versus 8.6%, p <0.001), previous history of stroke (8.3% versus 0.4%, p = 0.008), pneumonia (33.3% vs 9.9%, p <0.001) higher; symptoms of no angina and dyspnea encountered more (22.6% versus 7.6%, p <0.001; 82.4% versus 64.5%, p = 0.008); non-ST-elevation acute MI majority (94.4% versus 59.5%, p <0.001); who were emergency coronary angiography was lower (36.1% vs 85.3%, p <0.001); coronary lesions usually single vessel (61.1%), double vessels (30.6%), and no coronary lesions accounted for 2.8%; the treatment of type 2 acute MI group was treated medically conservation higher (47.2% versus 15.9%, p <0.001) and percutaneous coronary intervention was lower (52.8% versus 84.1%, p <0.001); In-hospital mortality (11.1% versus 5.2%, p = 0.152) and at 6 months were higher (20% versus 4.2%, p = 0.001).