Network machine cabinet double-cold-source cooling equipment

The invention provides network machine cabinet double-cold-source cooling equipment, which comprises a fan, a forced cooling passage, an air flow switching passage, a fresh air control passage and anair flow valve switching assembly, wherein the forced cooling passage is connected to a fan air return opening through a surface cooler; the forced cooling passage is provided with an air return opening communicated with the inside of the machine cabinet; the air flow switching passage is communicated with a fan exhaust opening; the air flow switching passage is provided with a heat discharge opening for discharging the air flow out of the system; the fresh air control passage is provided with an air supply opening communicated with the inside of the machine cabinet, an fresh air opening usedfor introducing system outside air flow, and an inside interface communicated with the air flow switching passage; the air flow valve switching assembly is used for controlling the opening and closingof the fresh air opening,