The invention relates to a detachable connecting locking member capable of adjusting a dental crown and an assembling method of the dental crown by means of the connecting locking member. The connecting locking member is composed of a combining part (110) which is embedded into the thread crown (10), an erecting part (120) which is embedded into a fixture (20), and a prolonged edge part (130) which is laterally prolonged on an interface between the erecting part and the combining part and prevents downward movement of the dental crown, thereby realizing close combination between the fixture and the dental crown. The combining part (110) realizes embedding of the combining part into an introducing hole (11) of the dental crown (10) through friction between more than two divided upper ends and the introducing hole of the dental crown. Through the method, on the condition that dental crown adjustment is required, based on a structure characteristic of easy detachment from the dental crown, not only can dental crown adjustment can be realized, but also maximal effects of detachment and assembling in use can be realized.