Composite bushing convenient to maintain and disassemble

The composite lining convenient to maintain and disassemble comprises an outer pipe, an oil storage cylinder, an oil absorption sponge and an inner pipe, two annular grooves are formed in the side wall of the outer pipe, two flanges are connected in the two annular grooves in a clamped mode, and the two flanges are connected with the inner pipe in a clamped mode. The four flanges are fixed to the inner side walls of the first connecting ring, the second connecting ring, the third connecting ring and the fourth connecting ring correspondingly, the first connecting ring and the third connecting ring are fixed to the outer wall of the outer pipe, and the third connecting ring is located over the first connecting ring. The first connecting ring and the third connecting ring are connected with a second connecting ring and a fourth connecting ring through a plurality of fastening bolts correspondingly, sealing plates are fixed to one ends of the first connecting ring, the second connecting ring, the third connectin