Laser material adding device and using method thereof

The invention discloses a laser additive device and a using method thereof, and relates to inorganic material manufacturing. Aiming at the characteristic of insufficient single-time utilization of the reaction gas, cyclic utilization is realized by recovering and purifying the reaction gas, so that the effects of reducing the preparation cost and improving the preparation quality are achieved. The laser additive device comprises a laser generator, a reaction cavity, a gas compressor, a gas purifier, a reaction gas replenisher and a gas pipeline, and the laser generator generates laser to induce reaction gas to react; the reaction cavity is isolated from external air and contains reaction gas to react therein; the gas compressor sucks gas in the device for compression and provides power for gas circulation in the device; the gas purifier is used for purifying gas in the device and removing impurities; the reaction gas replenisher provides new reaction gas and comprises a pressure reducing valve capable of cont