The present application discloses a method and a terminal device for wireless link monitoring. The method includes: starting, by a terminal device, a timer T310, when a number of out of sync (OOS) indications continuously received by the terminal device exceeds a first number N310; and determining, by the terminal device, whether to stop the timer T310 before the timer T310 expires, according to a number of in sync (IS) indications received after the timer T310 is started or according to a proportional relation between the IS indication and the OOS indication received after the timer T310 is started.