Anti-looseness quick-releasing lock

An anti-looseness quick-releasing lock belongs to the field of quick releasing and connecting of a cowling and a covering cap which are dismounted frequently in the structure of an aviation helicopter. The anti-looseness quick-releasing lock is characterized by comprising an outer lock base, a compression spring, an inner lock base, a horizontal pin, a gasket and a locking nail; the outer lock base, the compression spring, the inner lock base and the horizontal pin form a lock base component; the inner lock base is mounted after the compression spring is mounted inside the outer lock base, and finally the horizontal pin is mounted between the inner lock base and the outer lock base. The gasket and the locking nail form the locking nail component; after the locking nail is mounted on a cowling structure, the gasket is mounted into the locking nail, and finally the gasket is sunk and flattened by using a tool, so that the gasket is prevented from coming off from the locking nail. After the lock base component is mounted on a structural opening frame, the locking nail component is mounted on the structure of the cowling, and the mounting of the entire quick releasing locking can be accomplished. The anti-looseness quick-releasing lock provided by the invention has a simple structure, and is light in weight, small in size, attractive in appearance, high in reliability and convenient to demount.