The invention relates to a wind electricity power fluctuation tracking DC range analyzing method considering power grid spinning reserve capacity constraints. According to the invention, aiming at a condition that DC connecting two AC networks follows wind electricity power fluctuation, a factor of DC power fluctuation caused by sending and receiving end power grid stand-by cost, wind electricity prediction and prediction errors is considered comprehensively. According to a target function, minimization of cost including wind abandoning cost and power grid unit spinning reserve stand-by cost and the like is considered comprehensively, a load level of a power system and a wind electricity DC transmission flow level are simulated through defining a plurality of scenes, so that a starting-up combination problem is converted to a hybrid integer linear problem. Spinning stand-by capacity in future 24 hours is arranged reasonably and economically, so that an aim of calculating the wind electricity power fluctuation tracking DC range considering power grid spinning reserve capacity constraints is realized. The method has characteristics of simpleness, practicability, comprehensiveness and good operability.