The invention discloses a modular hollow louver window, comprising two glass modules, a control module, a louver module and an edging module; the edging module includes an upper edge, a left edge, a lower edge and a right edge; the louver module is clamped to the upper edge, the upper and lower ends of the left edge are inserted into the upper and lower edges respectively, the control module is connected to the right edge, the louver module is connected to the upper edge, the upper and lower ends of the right edge are clamped in from the sides of the upper and lower edges respectively, and after the louver module and the control module are assembled, the control module controls the louver module. Through the above settings, the modular hollow louver window is modularized, so that disassembly and assembly are facilitated; the modules to be changed or maintained are maintained independently, so that maintenance cost is lowered.