The utility model discloses a guide mechanism of an inward-bending rail breaker on a logistics rail vertical shaft. wherein the upper alignment assembly and the lower alignment assembly are arranged at the connecting end of a horizontal rail section and a horizontal fixed rail of a movable bent rail, and the left alignment assembly and the right alignment assembly are arranged on the movable bentrail. The left centering assembly and the right centering assembly comprise centering plates arranged on the rail back of the horizontal rail section of the movable bent rail, a left limiting plate and a right limiting plate, wherein the left limiting plate and the right limiting plate correspond to the centering plates and are arranged above the horizontal rail section. The rear ends of the leftlimiting plate and the right limiting plate are each provided with a guide wedge face capable of guiding the centering plates into the space between the left limiting plate and the right limiting plate. The upper aligning assembly and the lower aligning assembly comprise pin shafts arranged on the left rail side and the right rail side of the horizontal fixed rail and supporting plates corresponding to the pin shafts and arranged on the corresponding rail sides of the horizontal rail section of the movable bent rail, and the pin shafts are supported at the bottoms of the front ends of the corresponding supporting plates. The upper aligning assembly, the lower aligning assembly, the left aligning assembly and the right aligning assembly are adopted, so that accurate aligning connection between the returned movable bent rail and the horizontal fixed rail is guaranteed, the structure is simple and practical, and stability and reliability are achieved.