Composite grid-type air purifying filter core

The invention discloses a composite grid-type air purifying filter core. The composite grid-type air purifying filter core comprises a casing, the casing has a frame type structure, the casing comprises an upper plate, a left plate, a lower plate and a right plate which are sequentially connected end to end, a first screen plate, a second screen plate and filter plates are detachably disposed between the upper plate and the lower plate, the first screen plate and the second screen plate are clamped between the two filter plates, the first screen plate is provided with a vertical grille, the second screen plate is provided with a horizontal grille, the vertical grille of the first screen plate and the horizontal grille of the second screen plate are staggered to form a grid structure, the plate surface of the filter plate is provided with a plurality of raised adsorption columns, the adsorption columns are fixedly inserted into holes of the grid, the lower plate of the casing is provided with an air inlet and