Objective: To analyze the effectiveness of Biling Weitong Granules (BLWTG) combined with trimethoprim and vonoprazan in treating reflux esophagitis. Methods: Sixty patients with reflux esophagitis admitted to our hospital from March 2020 to March 2023 were selected as study subjects and randomly divided into a control group and an experimental group, with 30 cases in each group. The control group received only the combination treatment of trimethoprim and vonoprazan, while the experimental group was treated with BLWTG based on the control group. The acid reflux and heartburn symptom scores, quality-of-life scores, clinical efficacy, Chinese medicine symptom incidences, and the occurrence of adverse reactions before and after treatment in the two groups were compared. Results: After treatment, the acid reflux and heartburn symptom scores of patients in the experimental group were lower than those of the treatment control group, and the quality-of-life scores were higher than those of the treatment control group (P < 0.05). The total clinical efficacy of the experimental group was 96.66%, which was significantly higher than that of the control group (73.33%, P < 0.05). After treatment, the incidence of Chinese medicine symptoms, such as nausea and vomiting, abdominal distension and abdominal pain, and loss of appetite of the patients in the experimental group were significantly lower than those of the control group (P < 0.05). During the treatment period, there was no significant difference in the incidence of adverse reactions between the two groups, which indicated that the safety of the two treatments was comparable (P > 0.05). Conclusion: BLWTG combined with trimethoprim and vonoprazan was safe and reliable in treating reflux esophagitis, effectively relieving the symptoms and improving its clinical efficacy. This treatment is worthy of popularization.