A projection display apparatus using a microlens array and a micromirror array comprises a substrate, multiple micromirror arrays and multiple microlens arrays. The substrate is disposed apart with a predetermined distance from a light source. The multiple micromirror arrays are disposed over the substrate to be assembled together to have a predetermined incidence angle with respect to the incident rays. The multiple microlens arrays are configured to correspond to the micromirror arrays. More specifically, a first microlens array is disposed in a predetermined region between the light source and the substrate and comprises multiple microlenses. A second microlens array is disposed in a light path of reflection rays reflected from the micromirrors.