Cutting machining device for machining mechanical parts

The invention is suitable for the technical field of mechanical part machining, and provides a cutting machining device for mechanical part machining, the device adjusts the position of a first support in the direction of a first lead screw through a first displacement adjusting part, so that when the first support moves along the first displacement adjusting part, a moving seat is driven to move in a second rail groove, and the first lead screw is driven to move; when the moving seat moves to enable the rack to extend into the channel, the rotating fulcrum shaft can be driven to rotate, namely, the cutting mechanism is driven to turn over at the same time, and when the moving seat is located in the second rail groove, the cutting mechanism faces one side of the right-angle side of the metal plate and cuts the right-angle side of the metal plate. When the moving seat moves from the second rail groove into the first rail groove, the cutting mechanism turns around the moving seat to face the other side of the r