Brake device for automobile

The utility model provides a brake device for an automobile, which belongs to the technical field of brake systems, solves the problem that the traditional brake device for the automobile is poor in heat dissipation so as to influence the brake performance, and comprises a shell, a piston and a brake disc, a ventilation groove is formed in the shell, a heat dissipation piece is installed on the ventilation groove, the heat dissipation piece comprises an installation plate, a clamping base, a motor, fan blades and a housing, the installation plate is installed on the shell through screws, the clamping base is fixed to the installation plate, the motor is installed at the lower end of the installation plate, and the fan blades are installed on a rotating shaft of the motor; the piston is mounted on the shell; the brake disc is located below the shell. The rotating shaft of the motor is controlled to rotate to drive the fan blades to rotate, airflow generated by rotation of the fan blades is blown to the inner f