The utility model discloses a compact air cleaner, including framework (1), four sides of the upper and lower left and right sides of framework (1) are sealed, side -mounting filter layer I (2) and protecting wire net (4) before in framework (1), back side -mounting filter layer II (3) and protecting wire net (4) in framework (1). Air inlet plate (6) is installed through special -shaped plug connector (5) to the left surface or the right flank of framework (1), air inlet plate (6) middle part is equipped with can closed air intake (7). The two core structures of a frame that this compact air cleaner adopted have reduced installation interface, increase filter area, have reduced the resistance, have improved filtering quality and life to made things convenient for the integrated of device to use, go back accessible inlet -air interface's the change and the hierarchy configuration of filter core simultaneously and realize two -stage filtration, realize two kinds of functions on the structure, reduced filter overall dimension, the extension filter life -span.