Damping roller capable of reducing speed

The invention relates to the technical field of rollers, in particular to a damping roller capable of reducing speed, which comprises a roller shell, end cover assemblies and a buffer assembly, a middle shaft is arranged in the roller shell in a penetrating manner, the end cover assemblies are fixedly connected to the two ends of the middle shaft, each end cover assembly comprises a connecting block, and when an object passes through the roller shell, the connecting blocks are fixedly connected to the end cover assemblies. A roller shell rotates through a check ring, a first copper ring and a second copper ring can be driven to rotate at the same time when the roller shell rotates, the second copper ring is fixedly connected into a second movable groove, a permanent magnet ring is arranged in a fixed ring, and the permanent magnet ring can generate a reverse magnetic field; the second copper rings are subjected to reverse resistance transmitted from the permanent magnet rings during rotation, then the rotatin