Combining the characteristics of Cyperus esculentus-seeds and the requirements of planting in Huang-Huai-Hai Plain, in order to solve the problems of poor fluidity, poor filling-seed performance and three seeds per hole scattered and falling due to the uneven surface and irregular shape of the Cyperus esculentus-seeds, a Cyperus esculentus cell-wheel seed-metering device with low-position seeding and cavitation function and V-shaped groove was designed. Through the design of the diameter and the type hole of the metering wheel and the additional V-shaped groove on its surface, the precision separation, and filling-seed performance was improved; a low-position seeding and cavitation device was added under the metering wheel, which can be used to lower the height of seeding and it can also gather the scattered and falling seeds in the middle, which improved the effect of cavitation. The movement characteristics of the seed metering device were simulated through the EDEM, the influence of different structural parameters on the filling-seed performance was analyzed, and the structural parameters of the metering wheel were determined. The speed of the metering wheel, the height of the seed layer and the width of the type hole were taken as the test factors, and the three factors of the seeding qualified index, missing index, and multiple index were used as test indicators, and the quadratic rotation orthogonal combination test was carried out. The simulation test results showed that the primary and secondary order that affected the qualified index of the number of seeds was the speed of the metering wheel, the width of the type hole, and the height of the seed layer; when the speed of the metering wheel was 22.10r/min, the width of the type hole was 14.23mm and the height of the seed layer was 52.59mm, the qualified index was 92.11%, the missing index was 2.24%, and the multiple index was 5.65%. Finally, a bench test was carried out to verify the simulation results, and it was concluded that the Cyperus esculentus metering device with low-position seeding and cavitation function had better filling seed and cavitation performance, which met the requirements of precise seeding of Cyperus esculentus.