The utility model discloses a light source module in a mould, which comprises a mould shell group, an irradiating lamp bank, at least one power unit, and a plurality of blades, wherein an accommodating chamber is formed inside the mould shell group; a rectangular light transmitting opening is formed in front of the accommodating chamber; the irradiating lamp bank is provided with at least a lamp tube arranged on the light transmitting opening oppositely arranged at the accommodating chamber of the mould shell group; the power unit is connected with external power; and the blades are arranged in the light transmitting opening position of the mould shell group and are controlled by the power unit to close or open the light transmitting opening of the mould shell group. In the utility model,the irradiating lamp bank used for emitting UV rays or infrared rays is arranged in the mould shell group, and the light transmitting opening is formed for irradiating rays, and the plurality of blades are arranged on the light transmitting opening, and the light transmitting opening of the mould shell group is controlled to be close or opened through the power unit, so that the irradiating lamp bank can be energized and lighted up for a long time, and the illumination can be controlled to be used as required.