Hydraulic control system applicable to potato seeder

The invention relates to a hydraulic control system applicable to a potato seeder, which comprises a filter, a reducing valve, a sequence valve, a hydraulic motor, a safety valve, an unloading valve, a one-way cylinder, a sensor group and the like. The hydraulic motor is connected with the power output end of a sowing mechanism and the power input end of a fertilization mechanism to drive the sowing mechanism and the fertilization mechanism to move, so that the fertilizing amount and the row spacing can be adjusted in a follow-up manner when potatoes are sown and always maintain the initial set values at different moving speeds of the seeder, the uniformity of fertilization and seed sowing is ensured, the row spacing and the fertilizing amount can be adjusted infinitely, and different agricultural seeding requirements in various regions can be fully met.