This product is a mechanical pipe alignment device that utilizes high-strength adjusting bolts (jack bolts). By manually rotating these bolts, it generates powerful radial clamping force to restore pipe end roundness, align pipe sections, and secure the joint interface. Characterized by its simple structure, durability, reliability, and low cost, it achieves precise pipe end shaping, accurate positioning, and stable support. It provides the crucial foundation for obtaining high-quality circumferential weld seams, making it an essential tool for large-scale pipeline engineering projects.