A heating module (14A, 14B, 14C) for additive manufacturing, the heating module (14A, 14B, 14C) comprising: a plurality of heating devices, at least one module frame for supporting the plurality of heating devices, characterized in that each heating device comprises: a heating source; a reflective cover covering the heating source and formed in a curved shape, an inner surface of the reflective cover facing towards the heating source, the inner surface being made of thermal radiation reflective material; a cover rotating unit for rotating the reflective cover; a rotation controlling unit for controlling rotation of the cover rotating unit, wherein the rotation controlling unit controls the cover rotating unit to rotate the reflective cover so as to modulate a heating direction of the heating device to perform a scanning heating process for irradiating different areas; and a heating source holder for holding the heating source, the reflective cover, the cover rotating unit and the rotation controlling unit; and in that heating directions of the plurality of heating devices can be modulated so that the plurality of heating devices irradiate different areas or different locations of a specific area according to a set modulating mode during a complementary scanning heating procedure performed by the plurality of heating devices. a plurality of heating devices, at least one module frame for supporting the plurality of heating devices, characterized in that each heating device comprises: a heating source; a reflective cover covering the heating source and formed in a curved shape, an inner surface of the reflective cover facing towards the heating source, the inner surface being made of thermal radiation reflective material; a cover rotating unit for rotating the reflective cover; a rotation controlling unit for controlling rotation of the cover rotating unit, wherein the rotation controlling unit controls the cover rotating unit to rotate the reflective cover so as to modulate a heating direction of the heating device to perform a scanning heating process for irradiating different areas; and a heating source holder for holding the heating source, the reflective cover, the cover rotating unit and the rotation controlling unit; and in that heating directions of the plurality of heating devices can be modulated so that the plurality of heating devices irradiate different areas or different locations of a specific area according to a set modulating mode during a complementary scanning heating procedure performed by the plurality of heating devices. a heating source; a reflective cover covering the heating source and formed in a curved shape, an inner surface of the reflective cover facing towards the heating source, the inner surface being made of thermal radiation reflective material; a cover rotating unit for rotating the reflective cover; a rotation controlling unit for controlling rotation of the cover rotating unit, wherein the rotation controlling unit controls the cover rotating unit to rotate the reflective cover so as to modulate a heating direction of the heating device to perform a scanning heating process for irradiating different areas; and a heating source holder for holding the heating source, the reflective cover, the cover rotating unit and the rotation controlling unit; and in that heating directions of the plurality of heating devices can be modulated so that the plurality of heating devices irradiate different areas or different locations of a specific area according to a set modulating mode during a complementary scanning heating procedure performed by the plurality of heating devices.