Modularized power-saving cabinet

The invention relates to a modularized power-saving cabinet, which comprises a basic module, a top sealing module and a plurality of filling modules, the basic module, the filling modules and the top sealing module are arranged from bottom to top, and detachable fixing structures for fixing the basic module and the filling modules, the adjacent filling modules and the top sealing module and the filling modules are respectively arranged between the basic module and the filling modules, between the adjacent filling modules and between the top sealing module and the filling modules. A mounting cavity used for mounting components is formed in the filling module, communicating openings are formed in the upper side and the lower side of the mounting cavity respectively, a mounting plate used for fixing the components and an adjusting structure used for adjusting the front-back position of the mounting plate are arranged in the position, located between the communicating openings, of the mounting cavity, and a heat