In order to improve the mechanized harvest level of edible sunflower and solve the problems of high cost and high labor intensity of manual segmented harvest, an edible sunflower plate taking device was designed based on the principle of manual plate taking. Its main working part was the inclined conveyor chain plate taking mechanism, which simulated the action of pulling up the sunflower plate in the vertical direction when taking the plate manually, so as to realize the harvest of sunflower plate. According to the operation process and dynamic analysis of the parts, the key design parameters such as the push angle of the front turnover control cam, the push angle of the rear turnover control cam, the size and rotation position of the tray rod, the push rod angle and so on were determined, and the influencing factors and value range of the operation performance were obtained. Taking the forward speed of machines and tools, the angle of push rod and the height of inserting plate as the influencing factors of plate taking performance, and taking the total loss rate of plate taking as the response value, the three-factor and three-level orthogonal test was carried out, and the optimal parameter combination repeated test was carried out. The results showed that the order of significance of each factor on the total loss rate of the plate in the process of taking the plate was the push rod angle, the forward speed and the height of the plate. The optimal parameter combination was the forward speed of 0.4m/s, the push rod angle of 20° and the height of the plate of 1000mm. Under this parameter combination, the total loss rate of the plate was 1.22%. The sunflower plate taking device met the requirements of low loss harvest of edible sunflower.