The invention discloses an automobile air conditioning air inlet pre-cooling system. The automobile air conditioning air inlet pre-cooling system comprises a refrigeration air pipe, an air conditioning air inlet pipe, a water supply pipe and a fixed support, wherein openings are formed in two ends of the refrigeration air pipe, and the outer wall of the refrigeration air pipe is packaged with a thermal insulating layer; the outer wall of the air conditioning air inlet pipe is packaged with an evaporation layer, the air conditioning air inlet pipe is fixed inside the pipe cavity of the refrigeration air pipe through the fixed support, and a refrigeration air passage is reserved between the air conditioning air inlet pipe and the refrigeration air pipe; the water supply pipe is positioned inside the pipe cavity of the air conditioning air inlet pipe, and an air conditioning air inlet passage is reserved between the water supply pipe and the refrigeration air pipe; the water supply pipe is composed of a water supply main pipe and a plurality of water supply branch pipes connected onto the water supply main pipe, the water supply branch pipes run through the pipe wall of the air conditioning air inlet pipe, and a water outlet extends to the interior of the evaporation layer. According to the system, firstly, cooling pretreatment is carried out on external high temperature air, andthen air conditioning cooling is carried out, so that the consumption of energy is reduced; the application of a vehicle on original energy can be reduced, and wind energy generated when the vehicle travels at a high speed, so that the use for vehicle fuel is reduced.