In order to improve the treatment effect of supracondylar fracture of the humerus, the application value of elbow press combined with Zhongtong Ling paste in postoperative swelling and pain in children with supracondylar fracture of the humerus is analyzed. 82 children with humeral condylar fracture undergoing surgery in our hospital from March 2019 to May 2020 are selected and divided into the control group and research group according to the symptoms of soreness. The VAS score is used to observe and compare the pain degree before intervention (T1), 1 month after intervention (T2), and 3 months after intervention (T3).The Kaplan–Meier survival curve is obtained to observe the recurrence rate of swelling and pain in the two groups. Besides, the satisfaction scale designed by our hospital is employed to evaluate parents’ satisfaction with the treatment. The application of Zhongtong Ling ointment combined with elbow compression can effectively improve the curative effect, improve children’s pain, and promote rehabilitation in the treatment of postoperative swelling and pain of supracondylar fracture of the humerus in children.