Background: Frozen shoulder is a condition characterized by pain and limited range of motion (ROM), often persisting despite conservative treatments. Arthroscopic coracohumeral ligament (CHL) release is an emerging surgical option. This study evaluates the outcomes of CHL release in patients with frozen shoulder, focusing on pain, function, and ROM improvements. Patients and Methods: A prospective study was conducted with 20 adult patients with unilateral frozen shoulder, unresponsive to conservative management. All patients underwent arthroscopic CHL release and L-shaped incision of the rotator interval. Preoperative and postoperative assessments included pain scores, function scores, and ROM measurements (external and internal rotation, forward flexion, abduction) at 1, 3, and 6 months. Data were analyzed using SPSS version 20, with a significance level set at P < 0.05. Results: Significant improvements were observed in pain (76.09%) and function scores (94.07%) at 1 month postoperatively (P < 0.05). ROM, including forward flexion (60.33%) and abduction (60.29%), showed marked improvements. At 3 months, external rotation improved by 31.55% (P < 0.05), while internal rotation increased significantly by 19.11%. By 6 months, pain and function showed minor gains, but internal rotation achieved a significant improvement of 16.64% (P < 0.05). No significant differences in the UCLA score were observed between the 3- and 6-month follow-ups. Conclusion: Arthroscopic CHL release is effective for improving pain, function, and ROM in patients with frozen shoulders, particularly within the first three months post-surgery. Long-term benefits in internal rotation warrant further study.