The utility model discloses a repeat-entering whipstock for a multilateral well. The repeat-entering whipstock comprises a short connection joint, a guiding sleeve arranged on the outer side of the short connection joint, a positioning key, a sealing assembly, a clamping ring and a plug. An inner hexagonal cylinder screw and the positioning key are arranged on the outer side of the lower portion of the short connection joint. The sealing assembly is arranged at the lower end of the short connection joint, and the plug is arranged at the lower end of the sealing assembly. The clamping ring is arranged at the lower portion of the plug. According to the repeat-entering whipstock, an oblique guiding part of a short section of an oblique face is designed to be of a three-section type, accuracy of the oblique guiding direction of an oblique guiding face is increased, abrasion of the oblique face by grinding and milling tools is reduced, operation for measuring directions is reduced, cost is saved, a diameter is enlarged, and convenience is brought to measures for work in a late stage.