The invention discloses a feeding mechanism for a yarn storage disc. The feeding mechanism is characterized by comprising a mounting main shaft, a quick clamp, a rotating shaft, a transmission gear, arack, a driving air cylinder and a positioning device; the mounting main shaft is arranged on a machine frame, the quick clamp is arranged on the machine frame and is used for clamping the yarn storage disc to the mounting main shaft, the rotating shaft is arranged on the machine frame, is connected with the mounting main shaft and is coaxial with the mounting main shaft, the transmission gear isarranged on the rotating shaft, the rack is meshed with the transmission gear, the driving air cylinder is connected with the rack, and the positioning device is used for positioning the yarn storagedisc. The device has the advantages of being simple in structure, convenient in operation, low in cost, capable of directly, rapidly and accurately ensuring that a wire outlet hole of the yarn storage disc to be in the determined position, low in error rate, and high in production efficiency.