Vehicle sideslip angel is the most important parameter in vehicle electronic stability control. Its estimation errors directly influence the dynamics control. Aimed at the requirement of the vehicle stability control system of the four-wheel drive electric vehicle, four sideslip angle estimator algorithms, including integration algorithm, simple dynamics estimator algorithm, generalized Romberg algorithm and generalized Kalman filter algorithm, were simulated in this paper. Sensor signal errors and noises were analyzed based on the sensitivity of different algorithms to vehicle parameter errors in two typical test maneuvers. The result shows that the error sensitivity of different algorithms is quite different. In vehicle electronic stability control, integrated use should be made of the algorithms based on both kinematics and dynamics. This paper is of great importance to the practical application of active safety control technology for four-wheel drive electric vehicles.