The utility model provides an audio amplifier mould, including the cover half, movable mould and core, cover half and movable mould phase -match, set up and core assorted die cavity in the cover half, be equipped with comdenstion water inlet tube and condensation water outlet pipe on the movable mould, be equipped with the annular channel on the face of core and movable mould contact, annular channel one end and comdenstion water inlet tube intercommunication, the annular channel other end and condensation water outlet pipe intercommunication, the annular channel extends in to the core and is provided with a plurality of cooling chambeies, be equipped with the baffle parallel with the annular channel width in the middle of the cooling chamber, the baffle leaves the space in the one end and the cooling chamber bottom of cooling intracavity portion, the other end of baffle is inconsistent with the movable mould. Can make the comdenstion water flow at the cooling intracavity through setting up of annular channel, cooling chamber and baffle to prolonging the annular channel and flowing through the core, thereby reducing the setting of runner on the one hand, on the other hand also can be favorable to the comdenstion water to carry out the condensation through the core wall to injection mold, thereby has improved speed and effect that the mould was stereotyped.