Light path protection device for additive manufacturing equipment and additive manufacturing equipment

The invention relates to an optical path protection device for additive manufacturing equipment and the additive manufacturing equipment, belongs to the technical field of additive manufacturing, and solves the problem of poor optical path protection effect of devices and equipment in the prior art. Comprising a protective cover and a flow guide ring arranged below the protective cover, and the protective cover comprises an upper plate and an annular cover body arranged below the upper plate; the upper plate is provided with a through hole matched with the middle hole of the annular cover body, and the through hole directly faces a field lens of the additive manufacturing equipment; an optical lens is arranged on the inner wall of the annular cover body close to the upper edge, and air guide holes are formed in the inner wall of the annular cover body close to the lower edge; the flow guide ring is in a ring shape with a middle hole, the periphery of the flow guide ring is matched with the middle hole of the