The invention relates to control technologies for air suspensions of cars, and discloses an interconnection status control method for a four-corner interconnected air suspension. The method is characterized in that an ECU generates a front-axle lateral interconnection starting signal according to a front-axle left air spring pressure, a front-axle right air spring pressure and a car body roll angle, generates a rear-axle lateral interconnection signal according to a rear-axle left air spring pressure, a rear-axle right air spring pressure and the car body roll angle, generates a left-side longitudinal interconnection signal according to the front-axle left air spring pressure, the rear-axle left air spring pressure and a car body pitch angle, and generates a right-side longitudinal interconnection signal according to the front-axle right air spring pressure, the rear-axle right air spring pressure and the car body pitch angle. The method provided by the invention has the advantages that an interconnection status of the four-corner interconnected air suspension is reasonably controlled based on the product of a pressure difference between air springs on a same axle or on a same sideand the car body roll angle or the car body pitch angle, so that the running of a car under poor road conditions is smoother, and the car control stability during high-speed turning and accelerations/decelerations is not affected.