A precise localization for mobile target in wireless sensor networks is presented in this letter, where a geometrical relationship is explored to improve the location estimation for mobile target, in- stead of a simple centroid approach. The equations of location compensation algorithm for mobile target are derived based on linear trajectory prediction and sensor selective activation. The results based on extensive simulation experiments show that the compensation algorithm gets better per- formance in metrics of quality of tracking and energy efficiency with the change of sensor sensing range, the ratio of sensing range and sensor activation range, and the data sampling rate than traditional methods, which means our proposing can achieve better quality-energy tradeoff for mobile target in wireless sensor networks.