The invention discloses a comprehensive evaluation method for power receiving capability of a multichannel receiving end system under voltage stability constraint, and relates to the field of power systems. The method provides a single-channel power receiving capability evaluation index system and a multichannel power receiving capability evaluation index system. A fitting coefficient method is used to calculate a correlation relationship of respective indexes and obtain quantitative value of the power receiving capacity of a final receiving system. The method has good adaptability and can provide technical basis for the optimization of an actual system operation mode and the reinforcement of a grid structure. The method comprehensively takes account of the influences of the static voltagestability limit of the channels, the fluctuation amplitude of transient power, and the load power factor on the power receiving capacity of the receiving end power grid, can comprehensively evaluatethe power receiving limit of the receiving end power grid, and ensures the safe and stable operation of the power grid, and improves the economical efficiency of grid operation.