The invention relates to improvement of an electromagnetic clutch support in a new cocoon supplementary device of a silk reeling machine. The improved clutch support comprises a fixing frame, a main shaft, a work gear, a driving gear, electromagnetic clutches, a fixing ring and a fixing plate, and is characterized in that the fixing plate is additionally arranged at the joint of the fixing frame and a machine body; a copper sleeve is arranged in a hole of the fixing plate; the main shaft is matched with the copper sleeve; before improvement, the main shaft is supported by one fixing point, the swing factors of the shaft are many, each part and the electromagnetic clutches are abraded frequently, and the cost is high; and after improvement, a fixing point is added to the main shaft, so that the swinging of the main shaft is stabilized, and the abrasion of each part is reduced.