Node connecting device for fabricated building structure

The utility model discloses a node connecting device for an assembly type building structure, which comprises a vertical pile, the upper end of the vertical pile is fixedly connected with a rectangular block, node connecting mechanisms are arranged on the side walls of the left end and the right end of the rectangular block, and horizontal limiting rods are horizontally arranged on the node connecting mechanisms in a front-back penetrating manner; the side walls of the left end and the right end of the vertical pile are each rotationally connected with two movable blocks, and the multiple movable blocks are each provided with a limiting mechanism. A horizontal pile is in butt joint with a connecting block, an I-shaped limiting block is inserted into two T-shaped through grooves in the same side, then a horizontal limiting rod penetrates through a semicircular through groove and a circular through hole, and a movable block on a U-shaped connector is rotated until the movable rod is matched with a compression s