The invention provides a lubricating device of a self-lubricating sliding bearing, and belongs to the technical field of bearing lubricating devices. The lubricating device comprises a sliding bearingbody, a transparent sealing cover plate, an oil inlet
pipe,
sight glass, a one-way valve and a pump. The transparent sealing cover plate is provided with a threaded hole used for mounting the oil inlet
pipe and integrally arranged above the sliding bearing body; the
sight glass is arranged in the oil inlet
pipe; the one-way valve is arranged at the position of a bearing bush oil outlet of the sliding bearing body, and the pump is connected to the oil inlet pipe between the
sight glass and the one-way valve in series. The
oil pump is arranged on the outer side of the sliding bearing, lubricating oil in the sliding bearing is pumped out from the lower part of the bearing seat through the micro-backpressure one-way valve; the lubricating oil enters the space between a shaft and a bearing from the top of the sliding bearing, the transparent
sight glass is arranged on a pipeline before the lubricating oil enters the bearing, observation can be conducted through observation of the
sight glass, it is guaranteed that enough lubricating oil flows into the sliding bearing, formation of an
oil film is facilitated, and abrasion between a bearing bush and the shaft is reduced.