Method for synchronously jacking building of frame structure

The invention discloses a method for synchronously jacking a building of a frame structure. The method comprises the following steps that a jack is prepared for a first stroke, specifically, jack bases are placed on an upper bearing platform body of a supporting platform, and the upper end surfaces of jack hydraulic rods make close contact with a lower stress surface of the frame structure; the first stroke is ended, and a first boss cushion block is placed inside, specifically, the jack hydraulic rods upwards jack the frame structure under hydraulic control, a gap is formed between a lower boss of the frame structure and an upper boss of the supporting platform, and the first boss cushion block is placed between the lower boss and the upper boss of the supporting platform; and the jack isprepared for a second stroke, specifically, the jack hydraulic rods retract, and first jack cushion blocks are placed between the upper end surfaces of the jack hydraulic rods and the lower stress surface of the frame struct