Efficient CO2 trapping system

The utility model belongs to the technical field of flue gas trapping, and particularly relates to an efficient CO2 trapping system. Wherein an outlet rich solution of the main absorption tower is divided into two parts through a first flow divider, one part is preheated in a first heat exchanger by utilizing latent heat of regeneration mixed gas of a regeneration tower and then enters the regeneration tower, and the other part is preheated in a second liquid heat exchanger by utilizing sensible heat of regeneration barren solution of the regeneration tower and then enters the regeneration tower; the two preheated hot rich solutions are heated and absorbed through a reboiler, CO2 is desorbed in a regeneration tower to form regeneration mixed gas and regeneration barren solution, and CO2 product gas and water vapor are further separated from the regeneration mixed gas through a gas-liquid separator. On the premise that the load of the heat exchanger is reduced, the rich liquor temperature can be further increa