Abstract: It is important to fertilize in farm field that the information of soil nutrient are fast gotten by soil tool.Soil tests provide a scientific basis for evaluating available plant nutrients in farmland and analyses of soil samples can help farmers fine-tune nutrient applications from fertilizers and save money and protect the environment.Soil tool is an important instrument in the process of soil sampling，its performance quality decides the soil sample′s quality.This research is aim at carrying experiments on five kinds of soil tool（designed by College of Engineering，South China Agricultural University），and gather the information of the different soil tool.The information is mainly about sampling performance of the soil tool，so we can make further improvement to the tool.According to the test，No.1，a soil tool which has good sampling performance is given out for soil sampling in farmland.