Cantilever and dust removal equipment for large box girder manufacturing workshop

The invention discloses a cantilever and dust removal equipment for a large box girder manufacturing workshop. The cantilever comprises a driving arm, a manual arm, an air suction arm, a cantilever support and a suspension support; the cantilever support is arranged on a stand column, a driving motor and an induced draft fan are arranged on the cantilever support, and the driving motor is used for driving the driving arm to rotate; the suspension support is arranged on the stand column and located above the cantilever support, and a rigid suspension and a flexible suspension are connected to the suspension support; the rigid suspension is connected to the rear end of the driving arm, and the flexible suspension is connected to the front end of the driving arm; the front end of the driving arm is connected with the rear end of the manual arm through a rotary support, and the front end of the manual arm is connected with the air suction arm; and a plurality of dampers are arranged on the rotary support. By mean