Abstract: 【Objective】To explore the effects of different improved materials on maize yield and nutrient uptake and utilization in acidified yellow soil in Guizhou，which could provide reference for the development of compound acidified soil improver and the improvement of cultivated land quality in acidified yellow soil.【Method】Six treatments were set up：no fertilization（CK），optimized fertilization（T2），optimized fertilization+organic substitution（T3），optimized fertilization + organic substitution + biochar（T4），optimized fertilization + organic substitution + biochar + dolomite powder （T5），optimized fertilization+organic substitution+biochar+dolomite powder+other（microbial agents and humic acid） （T6）. The maize yield，nutrient accumulation and soil physical and chemical properties of each treatment were analyzed， and the compound effects of different improved materials were evaluated.【Result】Compared with T2 treatment，the grain biomass of T3-T6 treatments increased by 7.7%-40.7%，and T4-T6 treatments reached a significant level（P<0.05，the same below）. The straw biomass，grain nitrogen，phosphorus and potassium accumulation of T4-T6 treatments were significantly increased by 31.0%-33.4%，69.2%-113.5%，50.0%-82.2% and 31.8%-111.4% respectively. The agronomic efficiency，partial productivity and utilization rate of nitrogen fertilizer were significantly increased by 66.3%-165.0%， 14.6%-40.7% and 134.1%-235.4% respectively，and increased with the increase of compound types of improved materials. Compared with T2 treatment，the plant height，grain number per ear，1000-grain weight and ear diameter of T6 treatment were significantly increased by 12.3%，15.8%，12.2% and 2.7% respectively. The soil pH，contents of available phosphorus and available potassium were significantly increased by 8.0%，45.5% and 104.9% respectively，and the soil bulk density was significantly reduced by 7.7%. The maize yield and nutrient accumulation were correlated with soil nutrients at different degrees. The factors that had the greatest influence on maize yield，nitrogen，phosphorus and potassium accumulation were available phosphorus，available phosphorus，available potassium and total nitrogen content，respectively.【Conclusion】The combination of different improved materials can increase maize yield，nutrient accumulation and soil nutrient content to varying degrees，and with the increase of the types of compound improved materials，the improvement effect is continuously improved，and the effect of optimized fertilization + organic substitution + biochar + dolomite powder+other（microbial agents and humic acid）treatment is the best.