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Background Although there are numerous skin closure methods, there is no special method for suturing triangular skin wounds. The authors have summarized and modified their experience with a 3-dimensional (3D) continuous suturing technique for triangular wounds. Methods From December 2015 to September 2017, the 3D continuous suturing technique for triangular wounds has been used in 32 cleft lip repairs (48 surgical triangular incisions) and 11 cases of facial trauma (15 traumatic triangular wounds). The patients, 3 months to 39 years of age, had triangular flaps designed for esthetic purposes or triangular defects secondary to accidents. To evaluate the effectiveness of this technique, the mean follow-up was 7 months (range, 1-15 months). Results The 3D continuous suturing technique for triangular wounds can shorten the suturing time, decrease the number of thread knots, and shorten the time of surgery. All patients healed well and the stitches were removed 7 days postoperatively. The wound on both sides of the triangle was well arranged, with a good appearance and no scar hyperplasia. Conclusions Our experience showed that the 3D continuous suturing technique for triangular wounds is a time-saving and convenient method and can make the wounds closed tighter, more stable, and reliable. The technique can be applied to any type of triangular wounds or incisions and is not limited to the clinical scenarios described in this article.