A tri-folded electric umbrella with a double-folded shaft, characterized by comprising a rib, a shaft, a handle, and a control mechanism for opening and closing the umbrella, the shaft comprising an outer tube and an inner tube, an upper runner being fixedly arranged at a top end of the outer tube, a lower runner being slidably arranged on the outer tube, the rib being cooperated and connected with the upper runner and the lower runner, the inner tube being connected with an inner tube plug at a top thereof, and being connected with the handle at a bottom thereof, an upper runner pulley seat being arranged in the upper runner, a lower runner slider on which a lower runner pulley seat is fixedly arranged being arranged in the lower runner, a lower runner slider spring being arranged above the lower runner slider, the lower runner slider spring being connected with the lower runner slider at a bottom end thereof and being connected with the lower runner at a top end thereof, the control mechanism for opening and closing the umbrella comprising a pushing device, a pulling device, and a driving device, the pushing device comprising a lead screw arranged in the inner tube, a screw nut cooperated with the lead screw, and a nut connection wire connected with the screw nut, the nut connection wire being connected with the upper runner pulley seat at a top end thereof, the lead screw being connected with the driving device at a bottom end thereof, the pulling device comprising a pulling cord, an upper runner pulley and a lower runner pulley, an upper runner pulley shaft running through a middle portion of the upper runner pulley, the lower runner pulley being rotatably connected with the upper runner pulley seat at both ends thereof, a lower runner pulley shaft running through a middle portion of the lower runner pulley, the lower runner pulley shaft being rotatably connected with the lower runner pulley seat at both ends thereof, one end of the pulling cord being fixedly connected with the lower runner and the other end of the pulling cord coming round the lower runner pulley and the upper runner pulley in turn and penetrating into the outer tube to be fixedly connected with the inner tube plug, and the driving device being arranged in the handle and being a forward and reverse driving device. the shaft comprising an outer tube and an inner tube, an upper runner being fixedly arranged at a top end of the outer tube, a lower runner being slidably arranged on the outer tube, the rib being cooperated and connected with the upper runner and the lower runner, the inner tube being connected with an inner tube plug at a top thereof, and being connected with the handle at a bottom thereof, an upper runner pulley seat being arranged in the upper runner, a lower runner slider on which a lower runner pulley seat is fixedly arranged being arranged in the lower runner, a lower runner slider spring being arranged above the lower runner slider, the lower runner slider spring being connected with the lower runner slider at a bottom end thereof and being connected with the lower runner at a top end thereof, the control mechanism for opening and closing the umbrella comprising a pushing device, a pulling device, and a driving device, the pushing device comprising a lead screw arranged in the inner tube, a screw nut cooperated with the lead screw, and a nut connection wire connected with the screw nut, the nut connection wire being connected with the upper runner pulley seat at a top end thereof, the lead screw being connected with the driving device at a bottom end thereof, the pulling device comprising a pulling cord, an upper runner pulley and a lower runner pulley, an upper runner pulley shaft running through a middle portion of the upper runner pulley, the lower runner pulley being rotatably connected with the upper runner pulley seat at both ends thereof, a lower runner pulley shaft running through a middle portion of the lower runner pulley, the lower runner pulley shaft being rotatably connected with the lower runner pulley seat at both ends thereof, one end of the pulling cord being fixedly connected with the lower runner and the other end of the pulling cord coming round the lower runner pulley and the upper runner pulley in turn and penetrating into the outer tube to be fixedly connected with the inner tube plug, and the driving device being arranged in the handle and being a forward and reverse driving device.