The invention discloses a color photovoltaic module for building interior decoration and a preparation method thereof. The color photovoltaic module comprises frontal glass, a frontal sealing layer, a double-sided solar cell array, a rear sealing layer and rear glass from top to bottom in sequence, wherein the double-sided solar cell array is provided with a plurality of double-sided solar cells; the rear surface of each double-sided solar cell has a single color; the rear surfaces of the double-sided solar cells have at least one color. According to the color photovoltaic module and the preparation method thereof, a multi-color pattern can be acquired, building beauty is increased for internal visitors to appreciate, double-sided power generation can be realized, good transmission of light is achieved, and the power generation efficiency of the color photovoltaic module is improved.