Abstract:[Objective] To investigate the clinical outcome of a modified Chevron osteotomy in the treatment of moderate and severe hallux valgus. [Methods] From January 2019 to January 2021, 50 patients with moderate and severe bunion valgus underwent the modified Chevron osteotomy at the distal first metatarsal. The clinical and imaging consequences in short term were evaluated. [Results] All patients had the surgical procedure performed smoothly with the average operation time of (50.2±18.3) min, the amount of blood loss of (45.8±12.0) mL, and incisions healed in stage I. All patients were followed up for an average of (8.1±2.1) months. With time from preoperatively to 3 months postoperative and the last follow-up, the VAS score [(5.8±1.2), (2.3±0.5), (1.5±0.3), P＜0.001] and AOFAS score [(66.9±7.9), (82.7± 6.6), (93.8±4.1), P＜0.001] are improved significantly. Regarding image, the hallux valgus angle (HVA) [(34.3±5.3)°, (7.7±2.1)°, (7.8±1.9)°, P＜0.001], 1, 2 intermetatarsal angle (IMA) [(13.5±3.3)°, (5.2±1.4)°, (5.3±1.2)°, P＜0.001] and distal metatarsal articular angle (DMAA) [(19.7±3.6)°, (7.1±1.6)°, (7.2±1.8)°, P＜0.001] were also significantly improved. The mean healing time of osteotomy was of (10.9±2.2) weeks, and no adverse imaging changes such as bone nonunion, necrosis of the first metatarsal head, osteomyelitis, etc were found in anyone of them until the last follow-up. [Conclusion] This modified Chevron osteotomy at the distal first metatarsal is a reliable method for the treatment of moderate and severe bunions with satisfactory short-term results.