The utility model discloses an offshore wind power generation box-type transformer station with sulfuration protection, comprising a box body (1), wherein inside the box body there is provided a transformer (2), a low voltage switch cabinet (4) and a high voltage switch cabinet (3), the low voltage bus clamp (9) of the low voltage switch cabinet (4) is connected with the binding post I (5) of the transformer (2) through a copper bar I, the binding post II (6) of the transformer (2) is connected with the wiring terminal (10) of the high voltage switch cabinet (3) through a copper bar II, and the surfaces of the copper bar I and the copper bar II are respectively covered with a sulfuration protective layer I (7) and a sulfuration protective layer II (8). The offshore wind power generation box-type transformer station with sulfuration protection not only enables the insulating property to be increased, but also enables the anticorrosion performance to be better.