Portable hydrological information acquisition instrument

The utility model discloses a portable hydrological information acquisition instrument, and belongs to the technical field of hydrological information acquisition. The collecting instrument comprises a fixing seat, an inflatable airbag, a propeller driving mechanism and a sludge sampling mechanism, the inflatable airbag is connected with the fixing seat through a fixing rod, the propeller driving mechanism is connected with the fixing rod through a support, the sludge sampling mechanism penetrates through the fixing seat and is movably connected with the fixing seat, a first lifting mechanism is arranged on the fixing seat, and a second lifting mechanism is arranged on the fixing seat. The sludge sampling mechanism can be driven by the first lifting mechanism to do lifting motion. The hydrological information acquisition instrument can be moved to a designated position on a river surface and fixed, the acquisition instrument body can conveniently perform fixed-point acquisition on hydrological information at