The utility model discloses an outflow cooling hose assembly of a battery pack. Cooling hose, a first joint and a second joint are respectively arranged at two ends of the cooling hose; the positions,close to the first connector and the second connector, of the two ends of the cooling hose are sleeved with guide sleeves correspondingly. The guide sleeve is fixed on the cooling hose through a locking bolt; an indicating lamp is arranged on one side of the locking bolt; clamping grooves are formed in the guide sleeves; a conical groove is formed in the bottom of the clamping groove; two groupsof symmetrically arranged conducting strips are arranged at the bottom of the conical groove; a battery is mounted in a groove formed in the bottom of the clamping groove; the cooling hose comprises arubber pipe layer, a steel wire braided layer and a spring sheath layer which are sequentially arranged from inside to outside, the butt joint position of the connector is protected and isolated, theconnecting position is effectively protected, whether the connector leaks liquid or not can be monitored in real time, and judgment is convenient. And the strength and wear resistance of the hose structure are improved.