The invention discloses an avalanche detector coupling packaging structure. The avalanche detector coupling packaging structure comprises an avalanche detector, a lower coupling ring, an upper coupling ring, an adapter ring, a self-focusing lens carrier, an optical fiber component and a transmission optical fiber. The invention has the advantages that the avalanche detector coupling packaging structure is provided, and after adoption of the structure, a coupling region of the avalanche detector is encapsulated by heat-conducting glue, so that heat produced during the operation of the avalanche detector can be quickly exported by the heat-conducting glue.