The invention discloses a secondary variable pendulum chaotic vibrating mill, relating to a vibrating mill capable of generating special inertia excitation capacity, in particular to a vibrating mill with special vibrating effect, chaotic vibrating characteristics and a secondary variable pendulum structure. The vibrating mill comprises a vibration excitor, a cylinder body, a feed inlet, end covers, a coupling, a motor, a motor seat, a base, a helical spring, a discharge outlet, a right connecting bracket, a milling medium, a left connecting bracket and a balance weight body, wherein the vibration excitor is rigidly fixed at the right side of the cylinder body through the right connecting bracket; the balance weight body is rigidly fixed at the left side of the cylinder body through the left connecting bracket; the lower parts of the cylinder body and the vibration excitor are installed on the base through the helical spring; the vibration excitor comprises a bearing seat assembly, a vibration excitor shaft and a secondary variable pendulum assembly; the motor is connected with the vibration excitor shaft through the coupling; the secondary variable pendulum assembly comprises an invariable pendulum, a primary variable pendulum, a secondary variable pendulum, a secondary variable pendulum shaft, a bearing I and a bearing II; and the cylinder body is provided with the feed inlet and the discharge outlet, the end covers are installed at two sides of the cylinder body, and the milling medium is installed in the cylinder body.