Formwork supporting assembly for building construction and formwork system

The invention provides a formwork supporting assembly for building construction. The formwork supporting assembly for building construction comprises two movable frames, and the two movable frames are detachably fixed; the movable frame is provided with a plurality of supporting units, each supporting unit comprises an inclined supporting column, a pressure bearing seat, a driving part and a guiding telescopic mechanism, one end of each inclined supporting column is rotationally connected with a sliding seat, and the sliding seats are installed on the movable frame in a sliding mode; the driving part is connected to the sliding seat and used for driving the sliding seat to move; the pressure-bearing seat is rotationally connected to the inclined supporting column, a limiting groove is formed in the side face of the pressure-bearing seat, and a limiting piece used for being matched with the limiting groove for limiting is arranged on the side face of the formwork structure; the guiding telescopic assembly is c