Objective To analyze the influencing factors of different length of hospitalization in patients with schizophrenia. Methods Cluster sampling was used to review the electronic medical record system for schizophrenia inpatients admitted to Wuxi Mental Health Center from January 1 to December 31 in 2018. Basic and clinical data were collected， including gender， age， job， household registration， guardian， payment method for hospitalization， diagnostic classification， comorbidities， length of hospitalization. Disordered multinomial logistic regression was used to analyze the influencing factors of the different length of hospitalization. Results A total of 1 063 inpatients were investigated， with average age （49.97±15.58） years， male （566， 53.25%）， unemployment （943， 88.71%）， urban registered permanent residence （916， 86.17%）， course of disease more than 5 years （809， 76.11%）， number of hospitalizations more than 3 times （594， 55.87%）， paranoid schizophrenia （619， 58.23%）， comorbid somatic disease （590， 55.5%）， and medical insurance payment （895，84.2%）. 20.79% of the subjects were hospitalized for less than 1 month （221 cases）more than 1 month and less than 3 months accounted for 34.34% （365 cases）； more than 3 months and less than 12 months accounted for 11.00% （117 cases）； at least 12 months accounted for 33.87% （360 cases）. Regression analysis showed that male （OR=1.913， 95%CI：1.326-2.759；OR=2.835， 95%CI：1.717-4.679； OR=4.341， 95%CI：2.782-6.772）， unemployment （OR=1.735， 95%CI：1.082-2.780； OR=5.988， 95%CI：2.376- 15.087； OR=3.960， 95%CI：1.901-8.248）， medical insurance payment （OR=2.747， 95%CI：1.820-4.145； OR=7.565， 95%CI：3.502-16.342； OR=14.531， 95%CI：6.430-32.839） were the common influencing factors of hospitalization length more than 1 and less than 3 months， more than 3 months and less than 12 months， and at least 12 months. Non-core caregivers （OR=2.087， 95%CI：1.178-3.696； OR=4.173， 95%CI：2.539-6.856）， and more than 3 times of hospitalization （OR=1.775， 95%CI：1.095-2.878； OR=4.272， 95%CI：2.748- 6.641） were important risk factors for hospitalization length more than 3 months. Age more than 50 years old （OR=2.290， 95%CI：1.407-3.729）， course of disease more than 5 years （OR=5.555， 95%CI：2.749-11.228）， comorbid somatic disease （OR=2.034， 95%CI：1.301-3.181） were independent risk factors for hospitalization duration at least 12 months. Conclusions The length of hospitalization of schizophrenic patients are generally longer. Male， unemployment， medical insurance payment， non-core caregivers， hospitalization times more than 3 times， course of disease more than 5 years， age more than or equal to 50 years old， and comorbid somatic disease are closely related to the length of hospitalization and long-term hospitalization.