Double-cold-source cooling interface device of network cabinet

The utility model provides a network cabinet double-cold-source cooling interface device which comprises an air return channel which is provided with an air return channel air outlet used for being connected with an air conditioner air return port of an air conditioner and an air return port used for being communicated with the interior of a cabinet. The air flow switching channel is provided withan air flow switching channel air inlet used for being connected with an air conditioner air supply outlet of the air conditioner and a heat exhaust port used for exhausting air flow out of the system; the fresh air control channel is provided with an air supply outlet used for being communicated with the interior of the cabinet, a fresh air opening used for introducing system external airflow and an internal connector used for being communicated with the airflow switching channel; and the airflow valve switching assembly is used for controlling opening and closing of the fresh air opening, the internal connector and