The utility model discloses an air conditioner pipeline filtering device. The air conditioner pipeline filtering device comprises a plurality of connecting pipes, a hollow connecting cap and a filtering net, wherein the connecting pipes stretch into an air conditioner pipeline outlet, the connecting cap is used for abutting against the end face of the air conditioner pipeline outlet, the connecting pipes can be installed on the connecting cap in a gathered mode, and the filtering net is arranged inside the connecting cap. The connecting pipes of the filtering device are inserted into the air conditioner pipeline outlet, the connecting cap abuts against the end face of the air conditioner pipeline outlet, the filtering device is prevented from completely stretching into an air conditioner pipeline, and the filtering net is arranged inside the connecting cap; the drainage function of the air conditioner pipeline can be achieved through the connecting pipes, and the connecting pipes can be stably installed inside the air conditioner pipeline due to the fact that the connecting pipes are arranged on the connecting cap in the gathered mode; the air conditioner pipeline outlet is filtered through the filtering net, external animals can be prevented from entering the air conditioner pipeline through the air conditioner pipeline outlet, and therefore normal use of an air conditioner is ensured. The utility model further discloses the air conditioner with the air conditioner pipeline filtering device.