Agitator as a key component of fracturing unit, its dynamic characteristic has great influence on performance of fracturing fluid and operation of sand blender, so it is necessary to get the dynamic characteristic of agitator. In this study, we conduct the experimental modal test of agitator by using uTeKL dynamic signal analysis system. The modal test system structure, the procedure and the technique of modeling and testing is presented in detail. Also the finite element modal analysis of agitator is carried out with SolidWorks software. Modal test and finite element analysis reveal similar results with the maximum natural frequency error is 5.15% and corresponding modal shapes are nearly same, which means the method and technique of modal test proposed in this paper is correct, the result is confident, and the finite element modal analysis of the agitator is feasible.