The invention discloses a motor end cap automation assembling machine. The assembling machine comprises a rack. The rack is provided with an end cap conveying wire body. The end cap conveying wire body is provided with an end cap material loading box. The rack is provided with an end cap transferring device. An end cap detection device and an end cap turnover device are successively arranged along a conveying direction of the end cap conveying wire body. The rack and a tail end of the end cap conveying wire body are provided with a horizontal rotating disk and a rotating disk driving device driving the horizontal rotating disk to rotate. The horizontal rotating disk is provided with an end cap positioning tool used for positioning an end cap along a circumferential direction. On the rack, an end cap clamping station, a ripple circle automation assembling station, a ripple circle oiling station and an end cap unloading station are successively arranged around the horizontal rotating disk. A first transferring device is arranged between an output terminal of the end cap conveying wire body and the end cap clamping station. The ripple circle automation assembling station is provided with a ripple circle material loading device. The ripple circle oiling station is provided with a ripple circle oiling device. The machine possesses advantages that an automation degree is high and work efficiency is high. And the machine is especially suitable for a large-scale assembling end cap.