The invention discloses a stool with a foldable stool surface. The stool comprises a stool leg, a primary skeleton, a secondary skeleton, a fixed hinge seat, a movable hinge seat and movable supports, wherein the secondary skeleton is arranged in the primary skeleton; the fixed hinge seat is fixedly arranged at the upper end of the secondary skeleton, and the movable hinge seat is sleeved on the primary skeleton; the upper and lower ends of the movable supports are in hinged connection with the fixed hinge seat and the movable hinge seat respectively; a horizontal through hole is formed in the lower part of the secondary skeleton, a locking pin is arranged in the through hole, the primary skeleton is correspondingly provided with a through hole, and the locking pin can move back and forth in the through holes of the primary and secondary skeletons through springs arranged inside the secondary skeleton. The stool with the foldable stool surface has the advantages of small size, light weight, convenience in carrying, simplicity and easiness in operation and reliable performance.