The invention discloses a solid-liquid separation and filtering filter bag convenient to assemble and disassemble. The solid-liquid separation and filtering filter bag convenient to assemble and disassemble comprises a sleeve; a first lantern ring and a second lantern ring are arranged in the sleeve; the first lantern ring is positioned under the second lantern ring; a first filter bag body whichis arranged horizontally is clamped in the first lantern ring; a second filter bag body which is arranged horizontally is clamped in the second lantern ring; the same end of the bottom of each of thefirst lantern ring and the second lantern ring is provided with a threaded hole; the internal threads of the two threaded holes are connected with the same fastening bolt; the top of the fastening bolt is in threaded connection with a nut. A moving block moves in a moving groove to enhance the stability when the second lantern ring moves, the first lantern ring moves outwards along with the secondlantern ring through the fastening bolt, the nut is unscrewed, and a clamping block is pulled out of a clamping groove, so that the solid-liquid separation and filtering filter bag is more convenientto assemble and disassemble, reduces the workload when being changed and improves the change efficiency.