Pollution-free lubrication system of sewing machine

The invention relates to a pollution-free lubrication system of a sewing machine, which comprises a rotating shuttle part and a needle bar part, wherein the rotating shuttle part comprises an oil suction strand, an oil storage felt, a hollow rotating shuttle shaft and a high-speed rotating shuttle mechanism. The pollution-free lubrication system is characterized in that the inner cavity of the hollow rotating shuttle shaft is provided with a gas-oil mixture through hole, the oil storage felt is arranged at the top part of the upper oil tank body of a rotating shuttle sleeve, the bottom side of the oil storage felt is provided with an oil hole and a gas-oil mixture through hole, and the end part of the hollow rotating shuttle shaft is connected with the high-speed rotating shuttle mechanism; and the needle bar part comprises a needle bar, a needle bar sleeve, an oil storage tank and complex lithium grease, wherein the needle bar sleeve is arranged outside the needle bar, the oil storage tank is arranged at the