Abstract: There is provided a door frame security device, the frame having an inside portion and an outside portion with a strike plate affixed thereto, the strike plate mating with a bolt of the door as the bolt passes through it and a bolt bore in the door frame. The door frame security device includes a security plate adapted to be affixed to the inside portion of the door frame before installing the door frame. A reinforcing device for reinforcing the bolt bore may be interdependent with and extend from the security plate and may be positioned in-line and placed through the bolt bore. When the door is locked, the bolt passes through the strike plate and the bolt bore in the door frame and engages the reinforcing device that extends from the security plate. The bolt, security plate and reinforcing device jointly resist impact forces on the door.