Objective An infusion drip counter is designed,and its application effect is evaluated. Methods An infusion drip counter was self-developed,and it consists of infusion set buckle,display,start/mode switch button,battery,buzzer,infrared sensor area,etc. In the laboratory,the infusion drip rate measured by the drip counter was compared with the infusion drip rate set by the infusion pump,in order to evaluate the accuracy of the counter. Convenience sampling method was used to recruit 200 emergency patients with infusion admitted from March to May 2020 in a tertiary hospital,and they were divided into an experimental group (n=103) and a control group (n=97) according to the seat number during the infusion. The experimental group used the drip counter for counting,and the control group used the manual counting for counting. The difference between the predicted infusion completion time and the actual infusion completion time was compared,as well as the incidence of the intravenous infusion complications such as phlebitis,extravasation,tube blockage,blood return,and the patient satisfaction rate in the 2 groups. The satisfaction rate of nurses using the drip counter was evaluated. Results In the laboratory test,the accuracy of the drip rate counting of this counter was 99.6%,and the drip rate displayed by the counter was compared with the drip rate set by the infusion pump,and the difference was not statistically significant (P=0.829). In the process of clinical application,the difference between the predicted infusion completion time and the actual infusion completion time of the experimental group was smaller than that of the control group;the incidence of blood return was lower than that of the control group;the patient satisfaction rate was higher than that of the control group;the differences were statistically significant (P<0.05). The satisfaction rate of nurses was 96.1%. Conclusion The infusion drip counter has high counting accuracy. The use of this drip counter is beneficial to control the infusion drip rate,reduce the incidence of blood return,and improve the patient’s satisfaction rate.