The invention discloses a supporting bearing convenient to lubricate. The supporting bearing convenient to lubricate comprises a bearing outer ring, a bearing inner ring, a scraper, a squeezing screw,a fixing screw, an expansion rubber ring, a squeezing plate, a first rotary screw hole, a second rotary screw hole, a pushing plate, a grease block, a squeezing groove, a ball groove, a first sealingwasher, a second sealing washer, a brush, and a ball. According to the supporting bearing convenient to lubricate, the squeezing groove is formed in the bearing outer ring, after the expansion rubberring is heated and expanded, butter is squeezed and pushed out, the ball is lubricated, the butter can further be squeezed out by rotating the squeezing screw for lubrication, through the way of lubrication, using is convenient, and lubricating oil is saved; and dust entry can be reduced by arranging the first sealing washer and the second sealing washer between the bearing outer ring and the bearing inner ring, deposited dust between the bearing outer ring and the bearing inner ring can be cleared through the cooperation of the brush and the scraper, internal friction is reduced, and the service life of the bearing is prolonged.