Lock screw mechanical device and lock screw driving control method thereof

The invention discloses a lock screw mechanical device and a lock screw driving control method thereof. The lock screw mechanical device comprises an electric screw driver component and a pneumatic driving component, wherein the electric screw driver component is capable of absorbing screws and driving the screws for installation by virtue of negative pressure, and the pneumatic driving component is connected with the electric screw driver component and used for driving the electric screw driver component to move up and down; the electric screw driver component comprises an electric screw driver rod internally provided with a pneumatic passage, a gas conversion piece used for connecting and supporting the electric screw driver rod and an electric screw driver main body which is arranged at the upper end of the gas conversion piece and used for driving the electric screw driver rod to rotate; the gas conversion piece is provided with a pneumatic connecting hole communicated with the pneumatic passage. The lock screw mechanical device is simple and reliable, easy to realize, flexible in suction force control and free from any space limitation on lock screws.