Portable hydrological rain gauge capable of preventing evaporation and foreign matters

The utility model discloses a portable hydrological rain gauge capable of preventing evaporation and foreign matters. The rain gauge comprises a water storage bottle, and a liquid guide funnel, a protective net and a protective barrel which are positioned above the water storage bottle, the protective cylinder is of a split structure. The device comprises an upper cylinder and a lower cylinder which are in threaded connection, detachable protective barrel, conveniently carried outside, in windy weather, leaves fall onto the rain gauge; the rainwater can be blocked by the protective net and cannot fall into the liquid guide funnel to influence rainwater collection; the sealing ball can float on the water surface, when rainwater flows in, the sealing ball floats up, the rainwater flows intothe water storage bottle along the bottom of the liquid guide funnel, and when the rainwater stops flowing in, no rainwater flows in, the sealing ball falls down, the bottom of the liquid guide funnelis sealed, the rainwater