Flue gas carbon dioxide trapping device capable of quickly changing temperature

The utility model provides a flue gas carbon dioxide trapping device capable of quickly changing temperature, and relates to the technical field of carbon dioxide trapping devices, the flue gas carbon dioxide trapping device comprises trapping equipment, a first transmission pipeline is arranged on the outer surface of the trapping equipment close to the bottom, a cooler is arranged on the top surface of the trapping equipment close to one edge, and a second transmission pipeline is arranged on the top surface of the trapping equipment close to the other edge. A cooling structure is arranged at one end of an output pipe of the cooling machine, the cooling structure comprises a cooling pipeline, a connecting pipeline is fixed in the cooling pipeline through an extending plate, splicing and fixing of a suction structure are completed through a splicing structure, air is sucked into the trapping equipment through the suction structure, and the cooling structure is connected with the cooling pipeline. Air is main