The utility model discloses a keyboard-mouse one-to-many computer control device which comprises a movable terminal of a shift switch, a fixed terminal I of the shift switch, a fixed terminal II of the shift switch, a keyboard and mouse line of a computer A, a keyboard and mouse line of a computer B and a main control keyboard and mouse line. The movable terminal of the shift switch is connected with the main control keyboard and mouse line, the fixed terminal I of the shift switch is connected with the keyboard and mouse line of the computer A, and the fixed terminal II of the shift switch is connected with the keyboard and mouse line of the computer B. Due to adoption of the technical scheme, the keyboard-mouse one-to-many computer control device is simple in structure and low in cost, has more practicability and is convenient to implement and popularize.