Aiming at the optimal design and evaluate tester problem certain type aircraft inlet channel, simulation analysis the motion mechanism of U model. Adopt two electromotor to drive straightly the pitching axes, use an ALGOR 23 finite element analysis (FEA) software to analyze kinematics and finite element of testing set, FEA includes static analysis and model analysis. The result indicates that the structure design of tester satisfies requirement of specifications, can to afford reference for design.