The utility model provides a become porosity snow wall, installs the stand including a plurality of prefabricated concrete foundation who sets up side by side on the prefabricated concrete foundation,installs the snow wall board between two adjacent stands, and this snow wall board is by constituteing from last three baffles that down set gradually, this baffle includes parallel arrangement's first breast board, second breast board and third breast board, and first breast board and third breast board are located same vertical plane, and the second fence is located another vertical plane, thesecond breast board through two connecting plates respectively with first breast board and third breast board rigid coupling, on three breast boards all array alignment have a plurality of bleeder vents, shang mian pass through pore diameter on the baffle and pass through pore diameter on the baffle in the middle of being greater than, pass through pore diameter on the middle baffle and be greaterthan and pass through pore diameter on the following baffle. Should prevent that the rampart had reduced the snow grain quantity of the snow wall of jumping, and make the more even distribution of snow grain in the snow wall both sides, and increase and hindered the snowfall, increase substantially protection efficiency, the problem of current snow protection facility snowpack and snow scope inadequately is solved.