Aiming at the lagging and jumping problems in dynamic flight visualization of civil aircrafts, a real-time trajectory visualization algorithm for civil aircrafts based on prediction is studied and put forward. The algorithm includes three parts:track point prediction, target traveling and error correction. The track point prediction is improved based on GM(1, 1) algorithm. In each iteration, the development coefficients is dynamically adjusted according to all priori points and the search direction. The target traveling is based on the TSUS (Time Slice Uniform Speed) algorithm, which ensures that the target does indeed move to the destination within a period of time and adjusts the trajectory according to the initial direction. The error correction adopts the segmented error correction strategy to balance the accuracy and practicality of different situations. Experiments show that the algorithm can be effectively applied to visual trajectory rendering of civil aircrafts and improve the usability and user experience of the system.