Diesel engine auto purification EGR device

The utility model discloses a diesel engine auto purification EGR device, which comprises a housin, the casing is hollow structure, and is equipped with the baffle of level setting in the casing, theboth ends of baffle and the both sides inner wall fixed connection of casing, the both sides lateral wall of casing is equipped with air inlet and the gas outlet that the symmetry set up respectively,fixed connection is equipped with telescopic canular rods on one side inner wall of casing, telescopic canular rods includes first branch and second branch, first branch is hollow structure, and second branch inserts and establish in first branch, second branch is hollow structure, the one end of second branch is passed through buffer and is connected with the diapire of first branch, and the other end of second branch runs through one side lateral wall of first branch and be connected with a plurality of shower nozzles, and is a plurality of the shower nozzle all communicates with second branch is inside. The utility