The invention relates to a method for accurately simulating gear-shifting synchronization time of a lock ring type automobile synchronizer. For accurately simulating and solving the synchronization time of the lock ring type synchronizer, the invention proposes a novel gear-shifting synchronization process division method; a gear-shifting synchronization process is divided into five stages; gear sleeve displacement and input-end angular speed change models are established by stages; and synchronization time of simulated measurement and calculation is accurately equivalent to locking synchronization stage time in an actual working condition of the synchronizer. In addition, for improving the accuracy of a simulation result, the actual condition is considered and a dynamic variable is introduced to simulate change of a real frictional coefficient for the value-taking problem of a coefficient of friction between conical surfaces. Finally, synchronization time measured and calculated by the gear displacement change simulation model and the input/output-end angular speed change model is subjected to comparative verification, so that an obtained result is more credible. By use of the method provided by the invention, a simulated measurement and calculation result obtained by utilizing the simulation models is more accurate than synchronization time obtained by a conventional simulation method and is closer to actual synchronization time.