Abstract: Objective The heart rate deceleration force (DC), continuous heart rate deceleration force (DRs) and heart rate variability (HRV) in patients with type 2 diabetes mellitus and hypertension were discussed. Methods From August 2017 to August 2018, 85 patients with type 2 diabetes were selected, of which 41 patients with hypertension were assigned to the combined group, 44 patients without hypertension were assigned to the simple type 2 diabetes group. In the same period, 50 healthy subjects were selected as the healthy group. The changes of DC, DRs and HRV indexes in the three groups were compared and analyzed. Results The values of DC, DRs and HRV in the combined group were lower than those in the simple type 2 diabetes group and the healthy group, and the values of these parameters in the simple type 2 diabetes group were lower than in the healthy group (P<0.05). The proportion of DC, DRs and HRV in the high and medium risk of sudden death in the combined group was higher than that in the simple type 2 diabetes group and the healthy group, and the proportion of DC, DRs and HRV in the high and medium risk of sudden death in the simple type 2 diabetes group was higher than that in the healthy group (P<0.05). Conclusions The incidence of adverse cardiovascular events in patients with type 2 diabetes mellitus and hypertension is relatively high, so attention should be paid to the prevention and treatment of these conditions.