Filtering structure capable of replacing filter without shutdown

The invention discloses a filtering structure capable of replacing a filter without shutdown, which comprises an upper guide rail, a lower guide rail and a filter, wherein the upper guide rail and the lower guide rail are connected with an air blower, the filter is connected with the upper guide rail and the lower guide rail, the filter comprises a box-shaped outer frame, and a first air inlet window is formed in the bottom surface of the outer frame; the bottom of the outer frame is connected with an upper sliding block and a lower sliding block, the upper sliding block is located on the upper portion of the first air inlet window, the lower sliding block is located on the lower portion of the first air inlet window, and the upper sliding block and the lower sliding block are slidably connected with the upper guide rail and the lower guide rail in a one-to-one correspondence mode; a fine-efficiency filter screen and a coarse-efficiency filter screen are sequentially arranged in the outer frame; the filter fu