In order to study the influence of error on nozzle accuracy,the axial-symmetric vectoring exhaust nozzle was taken as the research object,and the parametric point function of ADAMS software was used to build the model and simulate to verify the validity of the model.The indexes of the measurement functions of deflection angle,azimuth angle and nozzle area were established to measure the accuracy of the nozzle.Based on the design research function,the sensitivity of single design variable error on nozzle accuracy was obtained.ADAMS/Insight module and Monte Carlo method were used to complete the analysis of random design variable error of parts with a faster speed and less workload.The results show that the deflection angle relative error of the simulation value and the mean is 0.675%,azimuth angle is 0.847%,and nozzle area is 0.048%,the variation of nozzle accuracy is small,and the working range of the engine can be guaranteed when the random error is -0.1 mm＜μ＜0.1 mm.