Efficient composite CO2 trapping agent as well as preparation method and application thereof

The invention relates to the field of waste gas recycling, in particular to an efficient composite CO2 trapping agent and a preparation method and application thereof. The method comprises the following steps: respectively dissolving an activating agent and a main absorbent, mixing, and then carrying out microwave treatment at a preset temperature for a preset time to obtain the composite absorbent, sequentially adding a stabilizer, a corrosion inhibitor and an antioxidant into the composite absorbent under the condition of a vacuum environment to obtain the efficient composite CO2 trapping agent. The mass ratio of the activating agent to the main absorbent is 1: 1-1: 5; the activating agent and the main absorbent are subjected to microwave reaction, and active components in the activating agent and the main absorbent generate a polyamido protonation product and an activated amino product by utilizing high energy of microwaves, so that the viscosity of the efficient compound CO2 trapping agent can be reduced,