Unpowered cyclone filter

The utility model relates to the technical field of rainwater treatment equipment, in particular to an unpowered cyclone filter. A water storage cavity for containing a filtering assembly is formed in a shell in the unpowered cyclone filter. A water outlet is formed in the side wall of the water storage cavity. The bottom of the water storage cavity is connected with a funnel cavity, and a drain outlet is formed in the bottom of the funnel cavity. An inner cylinder of the filtering assembly is embedded into an outer cylinder, the bottom of the outer cylinder is connected with the inner wall of the water storage cavity through a support, and a rotational flow cavity for containing the flow guide assembly is formed in the inner cylinder. And the rotational flow cavity is connected with the funnel cavity. The top cover is installed on the top of the outer cylinder, and a water inlet is formed in the side wall of the top cover. And the blade units of the flow guide assembly sleeve the side wall of the rotating sh