The present invention relates to a large-diameter low-speed sliding bearing mechanical lubricating device. Said invention includes the following several components: bearing seat, bearing liner, bearing cover, left and right symmetrical oil disk blade wheels and oil-scraping plates. On the bearing cover an oil-feeding tube and an oil-returning tube are set and communicated with the bearing liner, said oil-returning tube is directly connected with the oil storage tank on the bearing seat, the oil disk blade wheel is an oil-supplying component which can be turned with shaft, two symmetrical oil-scraping plates are mounted in the top portion of said bearing liner, and can be used for scraping lubricating oil carried from oil tank interior into the oil-feeding tube so as to lubricate the whole bearing. |