The lateral meniscus tear at the popliteal hiatus area is a tricky problem in clinical treatment due to the difficulty of preoperative diagnosis, narrow space for operation, lack of capsular attachments, and risk of vascular injuries. This article introduces an arthroscopic single-needle, all-inside technique suitable for repairing longitudinal and horizontal lateral meniscus tears at the popliteus tendon hiatus area. We believe this technique is safe, effective, economical and reproducible.