The invention discloses a power transmission line power-frequency induction voltage and current simulation calculation method. The method comprises the following steps that basic parameters of a power transmission line, a ground wire and a power transmission tower, the electrical resistivity of soil along the power transmission line and operating parameters of an operation line where the power transmission line is located are obtained, and the above-mentioned parameters are transmitted to an ATP-EMTP simulation system; an ATP-EMTP simulation module is built; power transmission line parameters are set; a source is applied to the operation line; power transmission line power-frequency induction voltage and current calculation comprises the steps that when power transmission line electrostatic induction voltage is calculated, circuit opening is needed for the two ends of the induced power transmission line; when power transmission line electromagnetic induction voltage is calculated, one end of the induced power transmission line needs to be subjected to grounding, and the other end of the induced power transmission line needs to be subjected to circuit opening; when an electrostatic induction current is calculated, one end of the induced power transmission line needs to be subjected to grounding, and the other end of the induced power transmission line needs to be subjected to circuit opening; when an electromagnetic induction current is calculated, the two ends of the induced power transmission line both need to be subjected to grounding. The power transmission line power-frequency induction voltage and current simulation calculation method is suitable for any parallel power transmission lines, and the calculation accuracy is high.