The invention provides a direct-current power curve determination method of a delivery system of wind-power base. According to the method, with consideration of factors including wind-power fluctuation, adjusting capacities and adjusting costs of direct-current sending and receiving terminal grids, the demand on direct-current transmission power from a direct-current receiving terminal grid, and the direct-current utilization hour, a direct-current power curve determination method considering multiple factors and different time scales is provided by combining long-term prediction, medium-term prediction, short-term prediction and ultra-short-term prediction results of the wind-power power as well as long-term generation, medium-term generation, short-term generation, ultra-short-term generation plans of the grid, so that a defect of conventional direct-current power arrangement in the prior art is overcome. A direct-current power constant value is given flexibly; a direct-current power curve is arranged reasonably; and the adjustment resources and complementary adjusting characteristic of the receiving and sending terminal grids are fully utilized, so that the direct-current receiving and sending terminal grids can participate in wind-power power fluctuation adjustment simultaneously. Therefore, the wind-power absorption range is extended; and the wind-power absorption capacity is improved.