The invention relates to a typical electric automobile daily charging and discharging method for a building load aggregator, which is technically characterized by comprising the following steps of: step 1, acquiring distributed power supply, building load and electric automobile parameters; step 2, acquiring distributed power supply output data, data of each time period of a typical day of the building load and electric automobile trip data; step 3, carrying out peak clipping and valley filling on a distributed power supply and building load curve according to a cut-off area method from a maximum peak-valley difference; step 4, optimizing by using the minimum payment cost of the load aggregator operator as a target function in a time period when the electric automobile participates in building interaction, and calling CPLEX to solve the concrete charging and discharging vehicle configuration in the time period when the electric automobile participates in the building interaction. The method can effectively integrate the dispersed resources such as the electric automobile and the like so as to reach the capacity threshold participating in market adjustment.