Objectives To describe the attitude , subjective norm and behavioral intention of ICU nurses toward mechanically ventilated patients in Chengdu. Methods The modified version of Attitude, Subjective Norm and Behavioral Intention of Nurses Toward Mechanically Ventilated Patients (ASIMP) was used to investigate ICU nurses in three tertiary-level hospitals in Chengdu. Results The attitude, subjective norm and behavioral intention among ICT nurses respectively toward mechanically ventilated patients were 69.1%, 91.3%, and 95.9%. Conclusion The attitude, subjective norm and behavioral intention of most ICT nurses toward mechanically ventilated patients were positive.