The utility model provides a locking device capable of improving the thread connection shock resistance property. The locking device capable of improving the thread connection shock resistance property consists of a connecting bolt (2), a connecting component (1) as well as a round locking gasket (5) arranged between the connecting bolt (2) and the connecting component (1). According to the utility model, an inner hole of the locking gasket is processed to be a shape matched with an outer square structure of a bolt head; and mechanical structure is utilized for matching, and reliable mechanical locking is carried out on the bolt, so that obvious shock resistance effect is obtained.