Sb nanoparticle @polypyrrole network structure anode material was fabricated by chemical reduction method combined with polypyrrole soft template method, the structure of Cu substrate and its mechanical behavior after different temperature cycles were studied. The results show that as the number of cycles increases, the thickness of Cu substrate powdered layer increases. After 50 cycles at 0 ℃ and 60 ℃, the Young's modulus and hardness of the Cu substrate are significantly lower than those of original Cu current collector, which might be due to the strengthening effect of the insoluble substance resultant from the dispersion of Li, Sb and C into the current collector. The Young's modulus and hardness of Cu substrate at 20 ℃ increase slightly, indicating Cu substrate is more brittle and less tough than original Cu current collector, thus indicating that temperature has a significant effect on the discharging performance of the battery.