The invention discloses an energy-storage-containing distributed power generation medium-and-long-term peak-and-average-valley electric quantity transaction matching method. On the basis of a full-time-period centralized bidding electric quantity transaction matching method, a time-sharing bidding mechanism is introduced for distributed power generation, and minimum transaction electric quantity constraint and local power distribution network tie line transmission power constraint are considered in the basic peak-average-valley time-sharing electric quantity transaction matching method; an electric quantity balance constraint, a transaction matching electric quantity constraint, a minimum transaction amount constraint, a regional transmission constraint and an objective function in an energy storage participation peak-average-valley time-interval electric quantity transaction matching method are considered; and the energy storage operator buys and stores the low-price electric energy in the valley period in the distributed power generation transaction by using the charging and discharging characteristics of the high-capacity energy storage equipment, and sells the low-price electric energy to the load in the peak period to complete transaction matching. According to the method, the distributed new energy nearby consumption is promoted, and meanwhile, reasonable peak-valley price difference benefits are obtained.