Engine cooling fan structure

The invention discloses an engine cooling fan structure, which belongs to the technical field of engine thermal management, and comprises a fan protection cover and an annular fan, the section of the fan protection cover is J-shaped, and the fan protection cover comprises an extension section and an inward back bending section; a plurality of guide vanes are annularly arrayed on the inner side of the extension section; a fixing support is connected to the air protection cover. And a clearance space surrounding the front edge of the outer ring of the fan blade is formed between the inner side of the guide vane and the back bending section of the fan cover. A gap space surrounding the front edge of the fan blade outer ring is formed between the inner sides of the guide vanes and the back bending section of the fan cover, the fan cover is directly fixed to the engine through the fixing support, the inner and outer gaps of the fan blade outer ring can be reduced, air loss can be obviously reduced, and fan efficie