To quantitatively analyse conditions of intensive care experiences and influencing factors of patients. A database was established, it can be seen from the overall experience index that in the SD dimensionality, 46.11% patients have highly bad experiences and 86.11% patients have moderate and highly bad experiences in total plus the patients with moderate scores; in ET dimensionality, 32.78% patients have highly bad experiences and 67.22% patients have moderate and highly bad experiences in total plus the patients with moderate scores; in TII dimensionality, 73.88% patients have moderate and highly bad experiences. L ICU and L MV of patients and overall GEI and various factor scores exhibit a significant positive correlation (P<0.05) indicating that the longer the time of mechanical ventilation treatment and length of stay in ICU, the more bad experiences the patients will have; patients' APACHE scores and the overall GEI, dimensionality ET, ACF and TII exhibit a positive correlation (P<0.05) indicating the severer the disease is, the more bad experiences on intensive care the patient will have. Mechanical ventilation duration, disease severity degrees, marital status and age are the major factors influencing intensive care experiences of patients in mechanical ventilation.