Outdoor water purifier is a kind of portable drinking water protection equipment when engaged in outdoor activities. When in use, the outdoor rainwater, streams, rivers, lakes and other natural water can be immediately purified into sterile and safe drinking water purification equipment or device without harmful substances such as suspended pollutants, and can be directly drunk by manpower without tap water pressure; It is also the best choice for soldiers, outdoor workers, tourists, explorers, outdoor enthusiasts such as mountaineering, hiking, camping, fishing and hunting. Getting safe drinking water in the local area during outdoor activities can not only avoid the burden of carrying a lot of drinking water with you, but also avoid diseases such as diarrhea, vomiting and fever caused by drinking unclean drinking water. At the same time, it is also an emergency water purification equipment to ensure the safety of drinking water when natural disasters such as earthquakes and floods occur.