The invention discloses a maximum power point tracking control method for a photovoltaic inverter. The method includes the steps: S1, allowing the voltage of a solar panel to be periodically disturbed in a fixed direction at a large step V_step_big from an open-circuit voltage point oc to a short-circuit point o, and recording power Ppv and operating voltage Vpv in each disturbance; S2, when MPPT (maximum power point tracking) minimum voltage V_min is disturbed, finishing the fixed-direction disturbance, finding out the maximum value Ppv_max of all the recorded power Ppv during disturbance from the point oc to the point V_min and the corresponding voltage value Vpv_max; S3, periodically disturbing at a small step V_step_small with the Vpv_max serving as an initial point to perform maximum power point tracking; and S4, as for the single-way MPPT, judging whether the operating voltage of the solar panel is smaller than the operating voltage of a bus or not in a scanning or searching state. The maximum power point tracking control method integrates MPPT tracking speed and tracking precision, two-way MPPT can be performed at the same time, and the method is applicable to mounting conditions of various solar panels.