The invention discloses a power grid control device. The power grid control device comprises an outer casing body and a main control box body for connecting the outer casing body; a receiving groove is formed in a right side end surface of the outer casing body; a first sliding cavity is formed in the outer casing body on the left side of the receiving groove; a first guiding groove is formed in an inner bottom wall of the receiving groove; a second sliding cavity is formed in the outer casing body on the left side of the first guiding groove; a first communication groove is formed between thefirst sliding cavity and the second sliding cavity in a mutual communication manner; a second communication groove is formed between the second sliding cavity and the first guiding groove in a mutualcommunication manner; a first sliding block is slidably connected to the second sliding cavity; and the first sliding block is internally screwed with a screw rod extending leftward and rightward; and a left extending end of the screw rod is rotatably connected to a left inner wall of the second sliding cavity, and a right extending end of the screw rod is mechanically connected to a driving motor.