The utility model provides a photovoltaic conversion module. The photovoltaic conversion module achieves miniaturization and can avoid short circuit caused by expansion of soldering tin used for sealing, so that the reliability is improved. The photovoltaic conversion module (24) comprises a base plate (26), a photovoltaic conversion element (30), a cover member (34) and a soldering tin layer (74), wherein the base plate (26) has light-admitting quality and is provided with an installation surface, a photovoltaic conversion element (30) installed on the installation surface of the base plate (26), the cover member (34) is fixed on the base plate (26) through a soldering tin layer (74) which is composed of soldering tin and is matched with the base plate (26) to form a cover member (34) of a sealed chamber (68) which accommodates the photovoltaic conversion element (30), and the soldering tin adsorption film (72) is arranged on the surface of the cover member (34), which is opposite to an installation surface and is fixed near areas on the base plate (26) through the soldering tin layer (74) and the soldering tin has adhesiveness.