The invention provides a high-speed arm-length-adjustable three-axis robot with electric clamping jaws. The high-speed arm-length-adjustable three-axis robot has the advantages that driving elements are arranged on a platform at the bottom, and a first arm and a second arm only bear their own weights and the weight of supporting connection rods; the lengths of the first arm and the second arm canbe adjusted, and high adaptability to different conditions is achieved; the driving elements for the electric clamping jaws are arranged outside clamping jaw bodies, and load of the second arm is low;the clamping jaws are driven by motors, and impact force is small and does not impact on movement of a manipulator; the tail-end movement speed is high, repeated positioning accuracy is high, and rapid work of the robot is achieved.