To study the uncertainty evaluation of various parameter errors in the actual measurement results of blades is necessary

due to the blade profile parameters have an important influence on the aerodynamic performance of the engine. Blade quality inspection based on CMM runs through the whole process of blade manufacturing. However

due to the complexity of blade measurement evaluation process and the diversity of parameter evaluation

it is difficult to evaluate the uncertainty of blade measurement results. In this paper

Monte Carlo method is used to build the model and simulate the measurement uncertainty of four typical blade profile parameters

and the uncertainty is compared with the traditional GUM method. The analysis and comparison results verify the correctness of the uncertainty analysis method of blade measurement in this paper

which is conducive to realize the on-line evaluation of measurement uncertainty of blade profile parameters

and is worthy of promotion and application.