Soil conductivity and soil mechanical resistance are the basis for determining the physical and chemical properties of soil, and soil texture and soil structure can be estimated. A vehiclemounted realtime measurement system based on the currentvoltage fourterminal method and the strain gauge bridge principle was designed and developed. It can be measured while plowing the ground, and can simultaneously measure soil conductivity and soil mechanical resistance. The system used a disc plow and a deep loose hook as the measuring sensor electrode. It had the functions of data measurement, transmission, display and storage, and had the characteristics of realtime, stability and accuracy. After the system was calibrated, the laboratory was tested in the laboratory. The conductivity part R2 was 0.9268〖JP〗 and the absolute error of the mechanical resistance part was 0.2~2.7N, indicating high accuracy and feasibility. The system needed to be further refined and improved through a large number of farmland experiments. It was hoped that more measuring sensor electrodes can be added later to determine more soil physical and chemical properties.