Bottom die supporting device of steel bar truss floor support plate

The invention belongs to the technical field of steel bar truss floor support plates, and particularly relates to a bottom die supporting device of a steel bar truss floor support plate, which comprises a steel bar truss, the steel bar truss comprises an upper chord, a lower chord and a web member, the bottom of the lower chord of the steel bar truss is connected with two connecting plates, and a bottom die is arranged below the two connecting plates. Two rows of bolts penetrating out of the top of the bottom die are arranged on the bottom die, threaded holes matched with the bolts are formed in the bottom of the connecting plate, and two rows of rotating blocks are rotationally connected to the bottom of the bottom die. The supporting rod is detachably connected with the lifting block, a temporary support is convenient to erect, the air cylinder drives the lifting block to enable the translation plate to move, the rotating rotating block drives the bolt to rotate, the bolt leaves the threaded hole, the botto