All-metal roller used for logistics system

An all-metal roller used for a logistics system comprises a metal shaft. At least one metal roller wheel is sleeved on the metal shaft; clamping springs for limiting are arranged on the metal shaft on two sides of each metal roller wheel; the metal roller wheel comprises an inner wheel and an outer wheel; the inner wheel is sleeved on the metal shaft; the outer wheel is sleeved on the inner wheel; and balls capable of enabling the inner and the outer wheels to roll relatively are arranged between the inner and the outer wheels. When in actual use, the roller is mounted on a panel of the goods shelf in a logistics warehouse in the mode that the roller wheels are arranged in a staggered manner so as to achieve the purpose that the roller wheels can have uniform stress. The all-metal roller has the advantages of simple structure, pressure and abrasion resistance, high temperature resistance and static electricity prevention. Besides, the two ends of the roller cannot be worn easily, the replacement frequency of