The utility model relates to a clamping mechanism of a dental mobile phone, which is arranged in a mobile phone. The clamping mechanism comprises a connecting piece for clamping dental tools, which is provided with at least two clamping parts which can be controlled to change their distances from each other； a control part which is correspondingly arranged with the connecting piece and butts against each clamping part.The control part can be controlled to generate displacement relative to each clamping part, and then push against each clamping part, so that the distance between the clamping parts changes with the position of the control part, so that each clamping part can clamp or loosen the dental tools； wherein, the control part or at least one of the clamping parts is provided with a tungsten carbide coating on the contact surface of the abutting parts.一種牙科手機之夾持機構，其設於一手機中，此夾持機構包括有一用以夾持牙科工具之連接件，其設有至少二個可受控制而變化彼此距離之夾部；一控制件，其與連接件對應設置且抵接各夾部。控制件可受控制而產生相對各夾部之位移，進而推抵各夾部，令各夾部之間的距離隨控制件之位置形成變化，以令各夾部夾持或鬆開牙科工具；其中，控制件或各夾部其中至少一者在其相抵接之接觸面上設有一碳化鎢鍍層。
