Abstract: Abstract: Operation quality of ridging has become more important in Northeastern China, as the soil is seriously hardening. The soil moisture content, protection against drought, and promoting maize growth have been significantly affected by the operation quality of the cultivation and ridge in the environment of corn growth. The reasonable agricultural structure and operation parameters can effectively improve the soil environment for the better growth of corn. However, there were some problems in the traditional covering device, such as the low ridging performance and breakage rate of soil particles. In this study, a new kind of cultivator ridging device with a curved wing was designed, including a soil heaping board and a novel improved system of resistance monitor during soil ridging operation. The addition of a curved wing was an effective way to raise the breakage rate of soil particles and ridging performance, since the construction can increase the soil disturbance. A soil bin test was conducted to verify the reliability of the improved systems in four contrast groups. The error analysis of the device was concurrently made using a resistance monitor of three-point form. In addition, a systematic theoretical analysis of parts and structure was performed on the cultivator ridging device with a curved wing, thereby designing the soil heaping board with curved wings. A Box-Behnken experiment was carried out to evaluate the working parameters, including the factors of operating speed, the angle of shovel wing, and digging depth. The breakage rate of soil particles and ridging performance were taken as the key target in the experimental conditions. A Design-Expert 8.0.6 software was selected to conduct the variance analysis and surface response analysis of the data, where the indicators were the pass rate of ridge height and the breakage rate of soil particles. Mathematic models were established between the indicators and factors, and the reliability of a model was verified in the field test. A multi-index optimization on all the factors was defined as the optimal combination of parameters and experimental verification. The results of performance test showed that the optimal parameters about each factor were the operating speed of 7.57 km/h, the angle of shovel wing of 61°, and the digging depth of 152 mm. In this optimal condition, the ridge height for the pass rate was 62.13 mm, and the breakage rate of soil particles was 86.78%. All the targets met the standard requirements for agricultural machinery. The experiment results were compared with the predicted values of the mathematic models, showing that the model was reliable. The field test showed that the ridging device with a curved wing had a high value in the pass rate of ridge height and the breakage rate of soil particles, indicating a better performance of ridging, and a better reliability of resistance monitor. The findings can offer new supporting technology and theoretical reference for the optimization design of a ridging device and operation quality of ridging.