A pivot door assembly, comprising a stationary frame; a movable frame having detachable hinge bases (105, 106) including an upper hinge base and a lower hinge base, each of the hinge bases (105, 106) being provided with a hinge shaft for connection with a pivot door; and a first screw; wherein a first screw hole is disposed on the upper hinge base and a second screw hole is disposed on an upper end of the movable frame; characterised in that the pivot door assembly further comprises an upper adjusting block located on an upper end of the stationary frame and having a slot; wherein when a relative position of the stationary frame and the movable frame is determined, the first screw can pass through the slot and the first screw hole to connect into the second screw hole; and in that the pivot door assembly further comprises a lower adjusting block fixed on a lower end of the stationary frame; each of the hinge bases (105, 106) is provided with a groove; a portion of the upper adjusting block is receivable in the groove of the upper hinge base with an upper surface of the upper adjusting block being flush with an upper surface of the upper hinge base; a portion of the lower adjusting block is receivable in the groove of the lower hinge base with a lower surface of the lower adjusting block being flush with a lower surface of the lower hinge base; the lower hinge base is fixed to the lower adjusting block by a fastener; and in that a through hole is disposed on a side of the lower hinge base, such that the lower hinge base can be fixed to the lower adjusting block by the fastener passing through the through hole. a stationary frame; a movable frame having detachable hinge bases (105, 106) including an upper hinge base and a lower hinge base, each of the hinge bases (105, 106) being provided with a hinge shaft for connection with a pivot door; and a first screw; wherein a first screw hole is disposed on the upper hinge base and a second screw hole is disposed on an upper end of the movable frame; characterised in that the pivot door assembly further comprises an upper adjusting block located on an upper end of the stationary frame and having a slot; wherein when a relative position of the stationary frame and the movable frame is determined, the first screw can pass through the slot and the first screw hole to connect into the second screw hole; and in that the pivot door assembly further comprises a lower adjusting block fixed on a lower end of the stationary frame; each of the hinge bases (105, 106) is provided with a groove; a portion of the upper adjusting block is receivable in the groove of the upper hinge base with an upper surface of the upper adjusting block being flush with an upper surface of the upper hinge base; a portion of the lower adjusting block is receivable in the groove of the lower hinge base with a lower surface of the lower adjusting block being flush with a lower surface of the lower hinge base; the lower hinge base is fixed to the lower adjusting block by a fastener; and in that a through hole is disposed on a side of the lower hinge base, such that the lower hinge base can be fixed to the lower adjusting block by the fastener passing through the through hole.