The invention discloses an anti-feeding blocking straw granulator comprising a pedestal. A rack and a machine body are fixed on the top of the pedestal; the machine body is arranged on one side of the rack; a feeding motor and a feeding pipeline are arranged on the top of the rack; the feeding motor is placed on one side of the feeding pipeline; a first feeding hopper, a smashing tank and a smashing motor are arranged on the top of the feeding pipeline; the smashing tank is placed between the first feeding hopper and the smashing motor; a material guiding pipe connected to one end of the first feeding hopper is connected to the top of the smashing tank; two symmetric baffle blocks are fixed on the inner side wall of the first feeding hopper; and a filter net is arranged over the two baffle blocks. With the two baffle blocks and the filter net disposed in the first feeding bucket, the filter net can be supported by the two baffle blocks; straws placed in the first feeding bucket can be filtered by the filter net; and short straws can pass through the filter net and long straws can be blocked by the filter net.