Filter with filter element convenient to replace

The filter comprises a filter body, the inner walls of the two sides of the filter body are provided with the same lower fixing ring, the outer wall of the top of the lower fixing ring is provided with a placing groove, and a filter screen plate matched with the placing groove is placed on the inner wall of the placing groove. Limiting grooves are formed in the four corners of the outer wall of the top of the lower fixing ring, the tops of the inner walls of the two sides of the filter body are connected with the same upper fixing ring in a sliding mode, limiting rods matched with the limitinggrooves are installed at the four corners of the outer wall of the bottom of the upper fixing ring, and connecting rods are installed on the two sides of the outer wall of the top of the upper fixingring. According to the utility model, the threaded rod, the fixing block, the threaded rod and the connecting rod below the connecting block are arranged, and the upper fixing ring can be driven to move downwards, so that the