The paper presents a treatment algorithm for supracondylar humeral fractures in children, involving temporary use of skeletal traction following failure of primary closed reduction and percutaneous fixation (CRPF) and introducing closed reduction after management by skeletal traction. The aim of this study was to assess the outcomes of supracondylar humerus fracture treatment performed according to the algorithm. The treatment was performed in 149 children (70 girls, 79 boys) with extension-type supracondylar humeral fractures. The study group was assessed with regard to a modified Gartland classification, neurological complications (12 children, 8%) and vascular complications (8 children, 5.4%). A total of 124 (83.2%) patients underwent emergency CRPF and 24 children (16.1%) received skeletal traction after a failed CRPF. After 2-6 days, an elective repeat CRPF procedure was attempted, which was successful in 17 children. The attempt failed in the other 7 children, who received traction and underwent open reduction under a single anesthesia. One child (0.7%) with a white and pulseless hand was treated by emergency open reduction and percutaneous fixation. The study used the Flynn criteria modified by the author. After 6 months, the results in the group treated with CRPF (both primary and following skeletal traction) were good in 90.8% of patients, satisfactory in 8.5%, and poor in 0.7%, whereas in the open reduction and percutaneous fixation group, the results were good in 87.5% of cases and satisfactory in 12.5%. 1. X-ray-guided closed reduction and percutaneous K wire fixation is a method of choice in the treatment of displaced supracondylar humeral fractures in children. If closed reduction fails, the surgeon is faced with a choice between primary open reduction and the use of direct traction through the olecranon. 2. The use of skeletal traction following failure of primary emergency CRPF results in local improvement in the fracture region and allows for scheduling an elective repeat delayed closed reduction and percutaneous K wire fixation procedure. 3. The algorithm used in clinical practice, based on literature reports and the author's experience, helps achieve good treatment outcomes.