A study of (40) cases of supracondylar fracture of humerus in children with class (3) according to Gartland classification were done at Al-Hussein Teaching Hospital in Samawa city at the period from 1/9/2022 to 1/5/2023. A (26) male and (14) female, with mean age ( ), the extension type formed (35) cases, while the flexion type (5) cases. We applied closed reduction and percutaneous pin fixation for (20) cases under general anesthesia and imaging control, while the other (20) cases were treated with open reduction and internal fixation with K-wires. We compared between the two methods (CRPP) and (ORIF) according to Baumann's angle, carrying angle and loss of the motion. All the cases were sent for anteroposterior (AP) and lateral view of the elbow. This study showed that the (CRPP) method is better than the (ORIF) method in the treatment of this fracture. We study the sex, side of limb, the mechanism of fracture and the type of fracture. We followed up the patient at the first week and then every two weeks for three months.