The invention discloses a sealing door sharing type storage system and an insect killing control method thereof. The storage system comprises a warehouse, insect killing equipment and a plurality of independent alcoholizing storerooms which are arranged in the warehouse and are used for keeping stored materials, and further comprises at least one movable sealing door which is provided with a fan; the alcoholizing storerooms also serve as insect killing rooms; the various alcoholizing storerooms are in controllable communication with the insect killing equipment; the various alcoholizing storerooms are provided with door-free door frames; the sealing door is a sealing door body which is shared by the various alcoholizing storerooms; and the sealing door is in sealing connection to the door-free door frames of the various alcoholizing storerooms in a detachable mode. According to the storage system disclosed by the invention, the sealing door is transported by virtue of a forklift so as to seal the alcoholizing storeroom for an insect killing operation, and after killing insects, the sealing door is carried to the next alcoholizing storeroom by virtue of the forklift for conducting sealed insect killing; and in the alcoholizing storeroom that the insect killing is finished, the stored materials, instead of being moved, are naturally alcoholized in the alcoholizing storeroom. Since the sealing door is shared by the plurality of alcoholizing storerooms, the storage system disclosed by the invention reduces investment cost. The storage system disclosed by the invention has the characteristics of being simple in structure and relatively low in investment and operating costs.