The invention discloses a protection method for preventing influences on a metal pipeline from the electric system earth current. The method comprises the following steps that modeling is conducted according to actual project parameters, and the simulated analysis is conducted on the value of leakage current density of the pipeline when a high-resistance protection layer is not added; the multipleneeded for limiting the corrosion current is determined according to the pipeline corrosion current; the current needing to be limited is determined after the high-resistance layer is added; the value to which the leakage current density needs to be reduced is calculated after pavement of the high-resistance protection layer; the value of the pipeline leakage current density is subjected to simulating calculation after the high-resistance protection layer is added; whether the value, obtained through calculation after the high-resistance protection layer is added, of the pipeline leakage current density and the calculated value to which the leakage current density needs to be reduced are close or not is judged through comparison, and the resistance value and thickness of the high-resistance protection layer are adjusted according to the comparison result. The method has high adaptability, influences on most of pipelines from the electric system earth current can be avoided, and meanwhile the beneficial effects of simple later maintaining and the like are achieved.