The more sophisticated body part is a brain which is covered within the hard structure of the skull, so that the abnormal growth of tissues makes this prone to tumor. The tumor may arise due to pressure on nearby brain tissues, effect the significant mechanical deformation. To outline the effective clinical interventions tumor-induced deformation are computed. In the present work, a viscoelastic medium characterized by key parameters to model a brain, includes elastic modulus, Poisson’s ratio, density, and anisotropy. The Finite Element Method (FEM) is employed to simulate tumor tissue deformation occur due to abnormal cells, also compute variables such as tumor size, location, and expansion rate. The goal of present work is to compute the tumor tissue deformation using material properties which may affects due to magnitude and spatial distribution of deformation. The tumor induced changes may be evaluated by assigning the precise biomechanical properties of brain tissue. The approach is to study the brain tumor biomechanics and to optimize the therapeutic strategies to reduce tissue damage and to preserve neurological function.