The theory of maize ear picking mechanism was studied based on the advantage of high efficiency and low-loss, and the influence of clamping position, vibration frequency and amplitude on the effect of maize ear picking was determined. The shocking spike model was established and the frequency characteristic curve suitable for the high efficiency and low-loss spike of maize was determined. The shocking and snapping experimental table designed by our own project team was adopted, the single factor influence rule of the clamping position, amplitude and frequency on the performance of snapping was carried out, and the parameter range was determined to satisfy the ear picking of corn. Under the condition of clamping position at 10.25~13.25cm, amplitude at 0.5~1cm and exciting frequency at 15~18.3Hz, it had an ideal exciting effect. Based on the single factor test analysis and in order to ensure the best picking effect without breaking the stem, the response surface methodology was uesd to study the change rule of spike removal after coupling parameters. Through response surface ANOVA analysis, the response regression equation of the effect of clamping position, amplitude and frequency on stem breaking rate and picking success rate was obtained. And combined with the response surface image, the specific influence of clamping position, amplitude and frequency on stem breaking rate and picking success rate were obtained. Finally, through parameter optimization, the best parameter combination suitable for maize high efficiency spike removal was determined. When the moisture content of grain was 30.58%, its clamping position was 10.8cm from the barycentric of the corn era. When the amplitude was 0.6cm and the excitation frequency was 17.8Hz. The stem breaking rate of maize was 2%, and the success rate of picking was 98%. The results fully met the technical requirements of corn harvest, and provided theoretical support for the development of corn harvester.