The invention discloses a shaft sleeve. The shaft sleeve can continuously contain oil so as to ensure that a transmission shaft can make sensitive action at any time in long-term use. The middle part of the inner surface of a shaft sleeve body is provided with a circle of oil groove. The middle part of the inner surface of the body is provided with the circle of oil groove capable of accommodating lubricating grease, so the shaft sleeve can be kept in an oil containing state for a long term. Moreover, for ensuring the long-term oil containing reliability, the oil groove is improved, and the oil groove is machined by cutting of at least two knives rather than simple one-time cutting, namely the groove is cut by the first knife, and the sunken part is cut by the second knife. Therefore, the vertically used shaft sleeve is vertically installed to ensure a lubricating effect.