The utility model provides a many adaptations type dustproof cap, includes the cap body, is equipped with extracting mechanism ( on the cap is personally experienced sth. Part of the body, extracting mechanism ( is the pull ring, and the pull ring makes an organic whole or is connected through coupling mechanism with the cap system, perhaps, extracting mechanism ( includes at least one and cap body articulated rocker, and the rocker other end is connected with the snap ring, and it is fixed that the snap ring passes through the locking bolt. The utility model provides a pair of many adaptations type dustproof cap, can be conveniently at the cap body and count that join in marriage or chieftain that light is joined in marriage is stained with and takes off fast after gluing, reduce the use of extra instrument, raise the efficiency.