The utility model relates to a railway vehicle air conditioner condensate fan mesh enclosure device. The railway vehicle air conditioner condensate fan mesh enclosure device comprises a diversion ring installing plate and a diversion ring installed on the diversion ring installing plate. A hoop support is fixed on the diversion ring, a supporting rod of a mesh enclosure is tightly fixed on the hoop support, a cover plate is arranged on the mesh enclosure, a mesh enclosure containing hole for containing the mesh enclosure is formed in the cover plate, the cover plate is provided with a cover plate circular support, and after the cover plate is installed, a certain gap is formed between the cover plate circular support and the diversion ring installing plate. The supporting rod of the mesh enclosure is fastened on the hoop support through a hoop and a bolt. When the cover plate is treaded or subjected to other external force, the diversion ring installing plate plays a certain supporting and buffering role on the cover plate, the alternating stress of the cover plate is reduced, and the cover plate tearing, mesh enclosure disengaging and other phenomena caused when the external force exceeds the ultimate yield strength of the cover plate in the process that treading and other external force act on the cover plate are avoided. The cover plate is not prone to being damaged.