Foldable filter element

The utility model discloses a foldable filter element, which relates to the technical field of filter elements and comprises a filter element body, an upper end cover is arranged at the top end of the filter element body, a lower end cover is arranged at the bottom end of the filter element body, a spring is arranged on the inner side of the filter element body, and the top ends of the filter element body and the spring are fixedly connected with the upper end cover. The bottom end of the filter element body and the bottom end of the spring are fixedly connected with the lower end cover, the middle of the upper end cover is rotationally connected with a screw cap, the bottom end of the screw cap is fixedly connected with an upper framework, the bottom end of the upper framework is fixedly connected with a first fixing cylinder, and the outer side of the upper framework is provided with an external thread; a lower framework is fixedly connected to the middle of the top end of the lower end cover, a second fixi