Online river flow monitoring system and device

An online river flow monitoring device provided by the present invention comprises a counterweight and a measuring rod, the top of the counterweight is provided with a supporting assembly, the supporting assembly comprises a lower sleeve and a telescopic sleeve, the inner side of the lower sleeve is provided with a flow monitoring assembly, the flow monitoring assembly comprises a water flow meter I and a water flow meter II, and the water flow meter I and the water flow meter II are connected through a connecting rod. An anti-blocking assembly is installed on the outer side of the lower sleeve, the anti-blocking assembly comprises a rotating sleeve and a filter cover, a driving assembly is installed on the inner side of the rotating sleeve, and the driving assembly comprises a first motor and a gear. The working reliability of the on-line river flow monitoring equipment is guaranteed, the accuracy of the water level depth can be guaranteed, errors of the water level depth caused by sludge attachment are avoi