The invention discloses a high-density giant magnetostrictive composite material forming device and method. The device is formed by a base, a rotating groove body, a baffle plate set, a copper mesh and an extrusion head. The base provides support and fixation in a vertical direction for the forming device and can ensure that the rotating groove body rotates horizontally around a central axis of the vertical direction. The baffle plate set is formed by a primary baffle plate and a combined secondary baffle plate. The primary baffle plate prevents the deformation of the copper mesh during extrusion molding. The combined secondary baffle includes two parts including a moving insertion plate and a fixed groove plate, and the secondary baffle plate can be opened and closed. The rotating groovebody, a static pressure head and the copper mesh are used as the main body of molding equipment, and the dynamic magnetic field orientation and high-density extrusion molding of the giant magnetostrictive composite material can be realized. The dynamic orientation and extrusion molding can be carried out for the giant magnetostrictive material, and the device and the method have the advantages ofa simple device structure and high molding efficiency.