Vehicle-mounted water storage tank for camping and use method thereof

The invention discloses a vehicle-mounted water storage tank for camping and a use method thereof, relates to the technical field of vehicle-mounted water storage tanks, and aims to solve the technical problem of insufficient functionality of the vehicle-mounted water storage tank for camping. A folding box frame assembly used for directionally folding and unfolding the water bag is fixedly arranged on the outer wall of the water bag. Annular overturning assemblies are arranged on the two axial sides of the water bag correspondingly; the two annular overturning assemblies are connected through a key shaft; the annular overturning assemblies are connected through at least two guiding installation connecting shafts. The invention further provides a method for using the vehicle-mounted water storage tank for camping. Through the arrangement of the annular overturning assembly and the folding box frame assembly, the water bag is unfolded and compressed, purified water is pumped to the outside from the water bag s