Post-processing assembly and vehicle

The utility model discloses a post-treatment assembly and a vehicle, and belongs to the technical field of tail gas treatment, the post-treatment assembly comprises a first cover cap and a mixer, thefirst cover cap and a rear end plate are connected to form a first cavity for communicating a DPF cylinder with the mixer, the mixer comprises an inner cylinder, an outer cylinder and a liner tube, and the first end of the inner cylinder is provided with a urea nozzle; the part, located in the first cavity, of the inner cylinder is provided with a plurality of circulation holes and a plurality ofinclined pieces corresponding to the circulation holes in a one-to-one mode in the circumferential direction of the inner cylinder, and the inclined pieces can enable tail gas flow entering the innercylinder to rotate anticlockwise or clockwise; one end of the outer cylinder is connected to the rear end plate, a second cavity communicated with the first cavity is formed between the outer cylinderand the inner cylinder, a s