Vehicle door matching size deviation analysis method with test bed as carrier

The invention relates to a vehicle door matching size deviation analysis method taking a test bed as a carrier, and the method is characterized in that a motion simulation system simulates the changes of a vehicle door hinge in X, Y and Z directions, and simulates the posture changes of a vehicle door on a vehicle body; the data scanning system uses a high-resolution optical scanner to scan three-dimensional size data of front and rear vehicle door assemblies, and outputs required vehicle door function size values according to user selection; scanning gap surface difference values of the measuring points of the vehicle door under different postures, and inputting analog values obtained by scanning the measuring points into a reverse iteration system for calculating deviations between the analog values of the measuring points under different postures and measured values of a real vehicle; according to the method, operation is convenient and labor-saving, automatic problem analysis can be completely achieved, d