Abstract: According to the measurements of the field conditions and physical parameters of cv KWS3148 sugar beet during harvesting stage, its planting mode has been established. SPSS was used to measure the main interval and frequency distribution of physical and geometric parameters for sugar beet, the relative position of sugar beet to soil has been determined, and the physical and geometric model of sugar beet was established. According to the test of the pulling force of sugar beet harvesting, the required pulling force of sugar beet under natural soil condition and the condition of the cut loosen soil on both sides by artificial have been achieved, which were (365 ± 196) and (259 ± 176) N, respectively. The pulling force was significantly correlated with the weight of root tuber and the size of the minor axis of the ellipse(P＜0.01), which is the intersecting surface of the root tuber. And it has notable bi-factorial correlations with the weight of root tuber, the maximum cross-sectional dimension and the length of root tuber at the 0.01 level. The pulling force was correlated with soil conditions, and was slightly related with the root systems of sugar beet. The test results indicated that the height of a root tuber above the ground is (60±24.4)mm, the maximum width of a root tuber is (120±28) mm, the length of the root tuber was (202±45.3) mm, the weight of the root tuber was (1198±530) g and the wedge angle of a sugar beet was (15.3°±2.14°). The established geometric model of sugar beet could provide a reference for the design of topper and harvester of sugar beet.