The invention discloses a fusion speed measuring method of an acceleration sensor and a wheel-axle speed sensor. According to the longitudinal acceleration of the vehicle collected by the accelerationsensor and the linear speed of each wheel axle collected by the wheel axle speed sensor, the three quantitative indicators of vehicle idling and taxiing are determined, namely the creep speed index of each wheel axle, acceleration index and acceleration differential index, and then the total corrected linear speed of the axle is obtained according to the three quantified indexes, according to thetotal corrected linear velocity and the longitudinal acceleration, therefore, the data measured by the acceleration sensor and the wheel-axle speed sensor can be fully fused by using the fusion speedmeasurement method, and the accuracy of the vehicle speed measurement is further improved compared with the prior art in which only the data measured by the acceleration sensor is selected as the judgment basis and the compensation increment. In addition, the invention also discloses a fusion speed measuring device of an acceleration sensor and an axle speed sensor, having the effect.