The invention provides an experiment table for optimization of a vehicle steering mechanism, belonging to the technical field of mechanical engineering. For the experiment table, the end part of a grooved connecting plate III is movably connected with the end part of a grooved connecting plate I; the end part of a grooved connecting plate II is movably connected with a grooved connecting plate IV;the middle of the front side of a connecting base plate IV is fixedly connected to the upper ends of the rear parts of a stand column I and a stand column II; the front end of a tire shaft I is fixedly connected with the left-upper corner of a connecting base plate III; the rear end of a coupler I is fixedly connected with the front end of a photoelectric encoder II; the front end of a tire shaftII is fixedly connected with the left-upper corner of a connecting base plate I; the rear end of a coupler II is fixedly connected with the front end of a photoelectric encoder I. According to the experiment table for optimization of the vehicle steering mechanism, the vehicle steering mechanism is abstracted and simplified, the structure is concise and clear, and the operation is convenient; themodular design is adopted, and the installation and debugging are convenient; the experiment table comprises two parts including software and hardware, and theoretical analysis and physical verification are combined. The experiment table can be applied to simple optimization design of parameters of the vehicle steering trapezoid mechanism, or is used as a teaching instrument for demonstrating theoptimization design method of the vehicle steering mechanism in teaching