Abstract: With change of potato cultivation agronomic，cultivating fertilization，laying drip irrigation hose and digging holes between ridges need to be done by farmers in the process of farming，and requirement of quantitative fertilization was strict.A potato cultivator with electrokinetic variable fertilization function was designed，which not only had drip irrigation hose laying mechanism and digging holes mechanism，but also could be driven by variable fertilization driving mechanism to realize same amount of fertilizer per unit area under different tillage speed.Therefore，it was convenient for users to manage quantitative fertilization.