The effects of Cu and Zn powders additives on the open-circuit voltage, discharge voltage and discharge capacity of lithium iron disulfide coin cells are studied. The experiments show that with 3 wt.% Cu powder as positive additive, the open-circuit voltage is 1.92 V, the capacity discharging at 1mA is 192mA·h and discharge voltage is 1.48 V. 89% and 121% capacity are discharged at -20 ℃ and 60 ℃ respectively. After high temperature storage, the discharge voltage is 1.47 V, while the discharge capacity is 188 mA·h. The results indicate that with the addition of Cu and Zn powders, the conductivity of iron disulfide are improved and the diffusive rate of Li+ is accelerated, and the discharge rate is increased. After high temperature storage, with the additives the polymer film on the surface of metallic lithium is not broken and the performance of cells are stable.