Adjustable externally-hung welding slag collecting device

The utility model discloses an adjustable externally-hung welding slag collecting device which comprises a body, a first clamping plate, a second clamping plate and chains connected with the four corners of the body. A bottom plate of the body is provided with a notch structure matched with a curtain wall keel; a first positioning pin and a second positioning pin are respectively arranged on two sides of the notch structure on the upper end surface of the bottom plate; the first clamping plate and the second clamping plate are installed on the bottom plate of the body on the two sides of the curtain wall keel respectively. The first clamping plate is provided with a first pin hole set in the direction perpendicular to the side wall of the curtain wall keel. The second clamping plate is provided with a second pin hole set in the direction perpendicular to the side wall of the curtain wall keel. A first flexible baffle and a second flexible baffle which are parallel to the two side walls of the curtain wall kee