Projection apparatus and control method thereof

The invention provides a projection apparatus and a control method thereof. The projection apparatus comprises a first light source module, a second light source module, a light guide module, a fluorescent powder wheel, a color wheel and a processing module. A first light beam provided by the first light source module is processed by the light guide module to form a second light beam; the second light beams enters an exciting area to form a third light beam and is reflected by a reflection area to form a fourth light beam; the third light beam and the fourth light beam are processed by the light guide module to form a fifth light beam and a sixth light beam; a seventh light beam provided by the second light source module passes through a notch to enter the light guide module to form an eighth light beam; and the color wheel receives the fifth, sixth, and eight light beams. When switching to a high brightness mode is realized, the processing module controls a first output current of the first light source modu