Balance based on the analysis of the dharma wheel load quickened, on the basis of measurement system is insufficient, improve the supporting structure of tire dynamic balance testing device, sensor types and connection mode, the improvement of tire dynamic balance test system, establishes the system amplitude displacement as input variables, tire uneven quality as output variables of multivariable mathematical model, using a laser noncontact measuring method to obtain the displacement signals, finally through the signal processing method of autocorrelation sequence comparison on load tire dynamic balance system displacement sensor and the force sensor signal collected by the timedomain diagram, the method is proven to be to improve stability and sensitivity test system has a better role in promoting.