Automobile exhaust pipe with good heat preservation performance

The utility model belongs to automobile parts, and particularly relates to an automobile exhaust pipe with good heat preservation performance, which comprises an exhaust pipe, a heat preservation structure is detachably installed on the outer wall of the exhaust pipe, the heat preservation structure comprises a rubber wrapping layer, a heat preservation cotton cushion and a flexible metal layer, the rubber wrapping layer is sleeved on the exhaust pipe, and the heat preservation cotton cushion is sleeved on the flexible metal layer. The rubber wrapping layer is wrapped by the heat preservation cotton cushion, and the heat preservation cotton cushion is wrapped by the flexible metal layer. The exhaust pipe further comprises an O-shaped rubber ring, a plurality of annular grooves are formed in the positions, close to the two ends, of the outer wall of the exhaust pipe at equal intervals, the annular grooves are wrapped by the ends of the rubber wrapping layer, the O-shaped rubber ring is arranged in the annular