Maneuvering target tracking based on multiple sensors is one of important aspects in the field of target tracking, which has been paid attention by domestic and foreign scholars and experts. With the development of modern science and technology and the unceasing enhancement of the target maneuver performance, which put forward higher requirement to target tracking. Aiming at maneuvering targets maneuvering characteristic, this paper focuses on Interacting Multiple Model based on Extended Kalman Filter (IMM-EKF) algorithm. The data preprocessing consisted of three process, coordinate transform，linear interpolation and data fusion. The Singer model of accelerate is used in target tracking on line based on IMM-EKF algorithm. The simulation of this algorithm shows that the algorithm is effective and superior.