LiZn_0.05Al_0.03Mn_1.92O₄ cathode material was synthesized by a solid-state combustion method and calcination temperature at 600、650、700 and 750 ℃. The experimental results show that Zn-Al co-doping and the calcination do not change the spinel structure of LiMn₂O₄. The crystallinity of the samples aggrandizes along with the increase of the calcination temperature. More truncated octahedral grains containing high exposure {111}, small area {110} and {100} crystal face are formed at 650 ℃ and higher temperature. However, some samples decompose at 750 ℃. At 5 C and 10 C, the initial specific discharge capacities and the capacity retention ratio after 1000 cycles are 101.3 mAh/g、81.5% and 99.9 mAh/g、74.3%, respectively. CV and EIS show that it has great cyclic reversibility and large Li₊ ^{diffusion coefficient. The Zn-Al} co-doping and morphology control modified LiMn₂O₄ cathode material can effectively inhibit the Jahn-Teller effect of spinel LiMn₂O₄ material. The truncated octahedral morphology reduces the dissolution of Mn and provides more Li^₊ diffusion channels. It improves the rate capacity and cycle life of the material.