Automobile air conditioner external circulation air inlet device and vehicle

The invention relates to the technical field of automobile air conditioners, in particular to an automobile air conditioner external circulation air inlet device and a vehicle, the automobile air conditioner external circulation air inlet device comprises an engine room, an engine room cover, an air inlet grille and a front cover decorating part, the air inlet grille is arranged on the inner side of the engine room cover, and an air inlet gap is formed between the front cover decorating part and the engine room cover; an air inlet gap is formed in the cabin and communicates with the air inlet grille, a switching air channel is formed in the cabin and communicates with the air inlet gap, the switching air channel communicates with an air conditioner air inlet end, a drainage structure is arranged on the front cover decorating part and used for draining entering rainwater out of a vehicle, and a water blocking unit is arranged in the switching air channel. Rainwater is prevented from entering the air inlet end