The invention discloses an agricultural tool position-based agricultural machine automatic driving system. The system comprises an RTK positioning system, a control system and an interaction terminal;the RTK positioning system is used for acquiring the precise positioning of an agricultural machine and an agricultural implement, and outputting the positioning data of the agricultural machine andthe positioning data of the agricultural implement to the control system; the interaction terminal is used for exchanging information with a remote platform, is connected with the control system so asto input a target travel trajectory to the control system; the control system is used for calculating a corrected target travel trajectory on the basis of the positioning data of the agricultural machine, the positioning data of the agricultural implement, and the target travel trajectory and controlling the agricultural machine to move on the corrected target travel trajectory.