Spasticityis an irreversible and debilitating complication associated with traumatic brain injury (TBI), which occurs in 75% of affected patients in their course of recovery. Spasticity is a disorder that is characterized by an increased muscle tone that is dependent on the velocity and exaggerated reflexes, which drastically affect both the functional mobility and activities of daily living and the overall quality of life of TBI survivors. This is a systematic review of the evidence-based physiotherapy applications that are currently used to manage spasticity in the TBI population. The systematic review of current literature indicates that physiotherapy is central to the multidisciplinary approach to post-TBI spasticity using different modalities such as stretching, neurodevelopmental, functional electrical stimulation, constraint induced movement therapy, task specific training, hydrotherapy and robot assisted therapy. The review discusses the development of spasticity after TBI, pathophysiology of the condition, and the instruments used in clinical practice and the effectiveness of various physiotherapeutic interventions. There is evidence that early intervention, personalized treatment plans, as well as combination of various treatment modalities, are the most effective. Nevertheless, there is a great variation in the treatment regimens and outcome measures among the studies and therefore a need to have standardized assessment measures and treatment regimens. The review finds that although physiotherapy is still an essential part of spasticity management, additional high-quality randomized controlled trials are required to set the conclusive treatment guidelines and define long-term functional outcome of spasticity patients in TBI.