In order to solve the problem of sowing faba beans and improve its mechanized level, a new type seed metering device was designed and evaluated. To analyze the pros and cons of the existed productions, an overall structure of the new spoon-clamping type seed metering device was built. Combined with physical characteristics of faba beans, the metering plate area, cambered slipway parameters and spoon-clip parameters were researched. For this metering device, there were different working areas and angles on metering plate, among which the seed-filling area was 105°, seed-clearing area was 130°, seed-protecting was 90°, seed-dropping area was 35°. And according to the theory of spoon-clamping type seed metering device, the range of length, width and bending angle of the new spoon can be optimized by measuring three-axis dimension. Bench experiments were conducted for the newly-designed spoon-clipping type seed-metering device. For confirming the optimal parameters of the new spoon-clamping type seed metering device, the orthogonal test was adopted with three levels and three factors. Three test parameters, i.e. length of spoon-clamp, width of spoon-clamp and bending angle were chosen as the influence factors of test experiment. The best working parameters were as below: the length of spoon-clamp was 15.5mm, the width of spoon-clamp was 10mm and the bending angle was 35°. The corresponding performance indexes were as following: the qualified index of seed spacing was 95.11%，the multiple index was 3.28%, and the missing-seeding index was 1.61%, which could completely meet the requirement of the technical specifications of quality evaluation for faba beans metering device in China. The research provided a reference for further improving quality and optimizing the parameter for spoon-clamping type metering device.