Building long-stroke redescending-free multi-point synchronous jacking method

The invention discloses a building long-stroke redescending-free multi-point synchronous jacking method, which comprises the following steps of (1) foundation treatment: a foundation around a building is subjected to reinforcing treatment, and in addition, lower part support points are set; (2) rigid tray construction: an artificial shield reinforced concrete box beam method is adopted for making a rigid tray at the bottom of the building; (3) end part support beam construction: end part support beams are respectively cast at two ends of a reinforced concrete box beam; (4) installation of short-stroke mechanical self locking jacks; (5) jacking: a multi-point synchronous redescending-free jacking method is adopted for upwards jacking the building; and (6) unloading: a replacement method is adopted for dismounting all jacks, and in addition, the foundation is cast. The method has the advantages that (1) the redescending-free jacking is realized through adopting a mode of replacing the jacks in bathes, and the a