Seventy cases of moderate to severe hallux valgus deformities were operated by proximal metatarsal chevron osteotomy combined with modified McBride procedures from September 1994 to September 1996. The hallux valgus angle improved from an average of 35.1 degrees to 12.1 degrees postoperatively. The first intermetatarsal angle improved from an average of 15.4 degrees to 7.9 degrees. The position of sesamoids was normalized and the metatarsal bone shortened minimally. Union occurred in 6 weeks. Subjectively, pain was relieved in 95% of the patients, while walking and standing abilities improved in 90%. The shoewear improved in only 60% of the patients, showing less satisfactory results compared to other factors. In terms of complications, two recurrences occured but were treated without repeat surgery. Two malunions and four superficial wound infections occurred. In conclusion, proximal chevron metatarsal osteotomy combined with modified McBride procedures is a reliable operation as regards stability, technical ease, low complications and satisfactory results for moderate to severe Hallux valgus deformities.