Objective To investigate the clinical effect of Miya cupping combined with conventional symptomatic treatment in children with exogenous fever. Methods This study was a randomized controlled trial. A total of 208 children with exogenous fever admitted to the fever clinic of the Second Affiliated Hospital of Guangzhou University of Chinese Medicine from September 2021 to June 2022 were selected, including 120 boys and 88 girls, aged 1.5-8.0 years. The children were divided into an experimental group and a control group using a simple random method, with 104 cases in each group. The control group adopted conventional symptomatic treatment, and the experimental group was given Miya cupping on the basis of conventional symptomatic treatment. The cooling efficacy and traditional Chinese Medicine (TCM) syndrome score of the two groups were compared. χ2 test, independent sample t test, paired t test, repeated measure ANOVA, and rank sum test were used. Results One case was withdrawn from each of the experimental group and the control group, and 103 cases were finally included in each group for analysis. Before treatment, the body temperatures of the two groups were higher than normal, and there were no statistically significant differences in the body temperature and TCM syndrome score between the two groups (all P>0.05). At 30 min, 1 h, 2 h, 4 h, and 6 h after treatment, the body temperatures of the experimental groups were (37.91±0.68) ℃, (37.64±0.58) ℃, (37.30±0.44) ℃, (36.97±0.32) ℃, and (36.89±0.30) ℃, respectively, those of the control group were (38.38±0.54) ℃, (38.15±0.45) ℃, (37.72±0.38) ℃, (37.39±0.28) ℃, and (37.20±0.23) ℃, respectively, and repeated measurement ANOVA showed that there was a statistically significant difference in the body temperature between the two groups (F=289.244, P<0.001). At 6 h after treatment, the effective rate of cooling was 99.0% (102/103) in the experimental group and 92.2% (95/103) in the control group, with a statistically significant difference between the two groups (χ2=5.693, P=0.017). The scores of fever, chills, red pharynx, nasal congestion, runny nose, cough, headache, and thirst in the experimental group were lower than those in the control group (all P<0.05). Conclusion Conventional symptomatic treatment combined with Miya cupping in the treatment of children with exogenous fever can effectively improve the clinical symptoms of fever, chills, red pharynx, nasal congestion, runny nose, cough, headache, and thirst, which has good efficacy and safety.