Abstract: An automatic ball launcher for pets includes a body shell, a ball launch aisle, a ball launch mechanism which is connected to the ball launch aisle and near the outlet for the ball; the ball launch mechanism comprises one or more ball launch wheels and one or more ball launch motors; the ball launch wheels are set on two sides of the ball launch aisle, a face of which is a concaved curve; the concaved curve matches the outline of the ball; regular teeth are arranged on the concaved curve; the ball launch wheels are driven by one or more ball launch motor and launch the ball from the outlet. The present invention effectively enlarged the contact surface between the wheels and the ball, which solve the problem of slippery ball being stuck inside the launcher. The playing is not interrupted by the stuck ball and is enjoyable.