The invention relates to a mechanical green Chinese onion hiller, which comprises a plough paddle, a support frame assembly and a baffle plate assembly, wherein the plough paddle is welded and fixed with the lower part of the support frame assembly; the support frame assembly and the baffle plate assembly are hinged; the width of two baffle plates can be adjusted through an adjusting plate. The mechanical green Chinese onion hiller provided by the invention solves the problem that the time and the labor are wasted for hilling green Chinese onions and other crops; the mechanical green Chinese onion hiller provided by the invention has the advantages of simple structure, low manufacturing cost, solidness and durability.