The invention relates to a method and a device for capturing complex
smoke on the surface of a
smelting pot. The method comprises the following steps: arranging a cover on an edge opening of the
smelting pot to cover the edge opening, and forming an opening for a stirring shaft to enter and exit in the center of the cover top; the cover top is provided with a plurality of flap plates and a
flue gas pipeline connected with a dust collecting
system, and the movable cover plate can be opened and closed, so that the requirements of feeding,
slag salvaging and observation of the
smelting pot are met, and meanwhile, the
flue gas is prevented from leaking; an automatic reset feeding flap plate is arranged at the connecting position of the rear end of the cover cap and the feeding device, the flap plate is pushed open during feeding, automatic reset closing is achieved after feeding, and it is guaranteed that
smoke does not leak out. The cover top of the device is divided into a feeding melting area, a stirring operation area, a
flue gas collecting area and a feeding and
slag salvaging operation area which are respectively provided with a feeding loose blade, a sealing loose blade, a flue connected with a dust collecting
system and a
slag salvaging loose blade. The method and the device provided by the invention are easy to manufacture and install, simple and convenient to operate, and capable of fully capturing
flue gas to ensure normal operation of a
dust collection system without influencing normal implementation of various operations of a pot surface platform.