The invention provides a three-way joint of a fuel evaporation and emission control pipeline, which is provided with a first branch pipe, a second branch pipe and a third branch pipe which are mutually communicated, wherein the orientations of the first branch pipe, the second branch pipe and the third branch pipe are opposite. The three-way joint is characterized in that three branch pipes are met at a columnar cavity in which a baffle is arranged, the baffle causes the first branch pipe to be circuitously communicated with the second branch pipe and causes the first branch pipe to be circuitously communicated with the third branch pipe, and the connection position of the third branch pipe on the columnar cavity is lower than those of the first branch pipe and the second branch pipe. Thetechnical scheme of the invention can effectively prevent air blockage caused by gathering of fuel near the three way joint; meanwhile, the arrangement of the fuel evaporation and emission control pipeline is more normalized and compact, less pipe clamps are needed, and cost is lowered.