The invention belongs to the field of preparation of asphalt compounds, and concretely relates to a preparation method of high-viscosity and high-elasticity asphalt. A preparation device adopted by the method comprises a box body, a controller, a driving unit and a stirring unit; the controller and the driving unit are arranged on the shell of the box body; the stirring unit is arranged inside thebox body; the controller is used for controlling the preparation device; the driving unit comprises a cylinder, a ball and a screw; the cylinder is located at the center of the bottom of the box body; the ball is connected to the box body by a nut; one end of the screw is connected with the top end of the piston of the cylinder; the stirring unit comprises rhombus frames, stirring rods and stirring blocks; every rhombus frame is formed by hinging four equilong rods; the quantity of the stirring rods is equal to or more than three; and one ends of the stirring blocks are hinged to hinge points, close to the sidewall of the box body, of the rhombus frames. Asphalt raw materials and ore powder are mixed and mixed sufficiently by the cooperation between the driving unit and the stirring unit.