Background Falls of T2DM inpatients with multiple comorbidities not only lead to musculoskeletal injury but also prolonged duration of hospital stay due to delayed healing, original diseases aggravation and increased risk of nosocomial infection.Objective To determine the risk factors of falling in T2DM patients during hospitalization.Methods Clinical data are selected from the patients administered in the department of endocrinology in Hainan General Hospital from the year of 2015 to 2020 with 38 patients in the fall group and 38 patients in the non-fall group. Clinical features and diagnosis-treatment differences are analyzed between the two groups and the correlations of falls and variables are as well evaluated. Results Levels of FBG, LDL-C, ALP, Morse Fall Scale (MFS), treatment of insulin or secretagogue, frequency of hypoglycemic events, diabetic peripheral neuropathy (DN), diabetic retinopathy (DR), chronic kidney disease (CKD), coexistence of cerebral infarction (CI) and osteoporosis (OP) rates in fall group were higher than those in non-fall group (P<0.05), the serum albumin (ALB), HDL-C and ADL scores were lower in fall group than those in non-fall group; MFS score, frequency of hypoglycemic events, DN, DR, CKD, OP, CI, FBG, LDL-C and ALP levels were positively correlated with fall (P<0.05);on the other hand, 25 (OH) D, serum calcium, ALB, and HDL-C levels were negatively correlated with falls (P<0.05);Binary logistic regression analysis revealed that low level of HDL-C and cerebral infarction were the main risk factors of falls in T2DM inpatients, and the higher the HDL-C, the lower the risk of falls (OR=0.021,P=0.002).Besides, the risk of falling was higher in patients with concurrent cerebral infarction (OR=21.738,P=0.029).Conclusion Patients with chronic diabetic complications, cerebral infarction or osteoporosis, insulin or insulin secretagogue adminstration, high frequency of hypoglycemic events and low HDL-C level are at a higher risk of falling during hospitalization. Therefore, it is necessary to identify the occurrence of falling intensely, prescribe drugs with lower risk of hypoglycemia , and reinforce fall prevention education.