Assembly type structure and assembly process of civil air defense ventilation pipeline

The invention discloses an assembly type structure and an assembly process of a civil air defense ventilation pipeline and relates to the field of civil air defense, a connecting assembly comprises a support and a connecting piece, the support comprises a supporting beam and supporting rods, the supporting rods are detachably connected to the two ends of the supporting beam, the supporting beam comprises an upper beam body and a lower beam body, and the upper beam body is arranged on the lower beam body; an upper through groove is concavely formed in the upper surface of the upper beam body, a lower through groove is concavely formed in the lower surface of the upper beam body, the lower beam body is fixedly arranged in the lower through groove, one end of the connecting piece is arranged in the upper through groove, an upper mounting hole is formed in the upper beam body, the upper through groove and the lower through groove are communicated through the mounting hole, a lower mounting hole is formed in the l