Abstract: At present, a vibrating type pomegranate threshing device has been designed for the problems of low removal rate and high damage rate of pomegranate threshing machines. First, the overall structure and working principle of the device are explained. According to theoretical analysis and preliminary tests, it was determined that the crank length X₁, crank speed X₂ and vibrating plate speed X₃ were the test factors, and the pomegranate threshing rate Y₁ and broken rate Y₂ were used as the target response values, and then the target response values were measured by the Design-expert software. According to the data analysis, the significant order that affects pomegranate threshing rate Y₁ was: crank speed X₂＞ vibrating plate rotational speed X₃＞ crank length X₁, and the significant order affecting broken rate Y₂ was: crank rotational speed X₂＞ crank length X₁＞ vibrating plate rotational speed X₃. It was verified by experiments that when the crank length X₁ was 57 mm, the crank speed X₂ was 139 r/min, and the vibrating plate speed X₃ was 29 r/min, the pomegranate threshing rate Y₁ was 95.58%, and the broken rate Y₂ was 2.38. %, the relative error between the experimental value and the optimized result was 1.37% and 3.03%, both are less than 5%.