T lymphocyte (T cell) is a crucial member in adaptive immunity that protects the organism against foreign pathogens and cancer by producing cytokines and cytotoxic molecules. In T cell, the cytoskeleton is in a stable and dynamic renewed condition and maintains shape and mechanical resistance to deformation. The cytoskeleton changes lead to morphological differences of T cell, and then affect local mechanical properties and cellular behavior, including development, differentiation, polarization, migration or adhesion. In this review, we will discuss the effect of cytoskeleton changes on T cell biological behaviors and its mechanism.