The invention discloses a power grid capital construction improvement and promotion decision-making method, and belongs to the field of power grid capital construction project planning. The method comprises the following steps: establishment of a decision-making model, improvement, determination of a lifting decision and the like. Collecting index data and comprehensive index data of a plurality of power grid capital construction projects according to the decision model; comparing the index data of each power grid capital construction project with the comprehensive index, and determining the index data which has insufficient contribution to the decision-making model; and determining a factor influencing the index data, and making a decision for overcoming the factor and improving the powergrid capital construction project. The invention provides an improved and promoted decision-making method for power grid capital construction operation; Therefore, power grid enterprises can discoverthe defects of operation of power grid capital construction projects of the enterprises both inside and outside, and the industry competitiveness is greatly improved.