Solid particle filter

The utility model discloses a solid particle filter which comprises a filter barrel, a filter screen is arranged at the lower port of the filter barrel, and a lower extrusion piece (10) is arranged at the upper edge of the peripheral wall of the upper port of the filter barrel; the driving mechanism comprises an upper extrusion part (5) which is matched with the lower extrusion part (10), and the upper extrusion part (5) and the lower extrusion part (10) are subjected to periodic sliding abutting and buckling matching action through rotation; the elastic assembly comprises a supporting lug (8) connected with the supporting piece; the sliding sleeve (12) is fixedly connected with the filtering barrel; the sliding rod (11) is used for connecting the supporting lug (8) and the sliding sleeve (12), and the sliding sleeve (12) can slide relative to the sliding rod (11); the supporting spring (13) is arranged on the periphery of the sliding rod (11) in a sleeving mode and arranged between the supporting lug (8) and