The invention discloses a special-shaped prefabricated prestressed wall connecting structure and an assembly method. The connecting structure comprises shear wall plates and prestressed walls, whereineach prestressed wall comprises a matrix and connectors distributed around the matrix; each connector is provided with a longitudinal groove; each longitudinal groove penetrates through the top surface and the bottom surface of each connector as well as the side surface away from each matrix; one side surface of each shear wall plate is connected with each longitudinal groove to enable each longitudinal groove to form a longitudinal groove well; prestressed reinforcements penetrating through the top surface and the bottom surface of each matrix are distributed in each matrix; transverse shearreinforcements transversely penetrating through each longitudinal groove are pre-embedded in each longitudinal groove; embedded reinforcements are arranged between each shear wall plate and each prestressed wall; and one end of each embedded reinforcement is positioned in each matrix, and the other end of each embedded reinforcement passes through each longitudinal groove and extends into each shear wall plate. The connecting structure disclosed by the invention has the advantages that on the premise of guaranteeing the quality, the construction process is simplified, and the construction cost is reduced.