Quadrilateral flap technique for primary cheiloplasty in patients with cleft lip was initially developed by Hagedorn in 1884. After Le Mesurier presented this procedure in 1940’s, many surgeons adopted this technique for clinical advantage of reconstruction of Cupid’s bow and lesser amount of tissue discarding than straight line technique. However, owing to its drawbacks such as sacrifice of Cupid’s bow and prominent scar on philtral ridge, other techniques like Tennison’s triangular flap and Millard’s rotation‐advancement flap have gradually taken its place. Nevertheless, some clinicians like Dr. Wang has modified this quadrilateral flap technique for better clinical outcomes. In this report we present 3 cases of unilateral complete cleft lip patients who underwent primary cheiloplasty with favorable outcomes based on Dr. Wang’s modified quadrilateral flap technique.