Trunk runoff measuring device and installation method thereof

The invention discloses a trunk runoff measuring device and an installation method thereof. The trunk runoff measuring device comprises a flow collecting mechanism and a metering mechanism connected to the end of the flow collecting mechanism; the flow collecting mechanism comprises a flow collecting hose provided with a water receiving part and a diversion part, an inlet end of the diversion partis connected with an outlet end of the water receiving part, the water receiving part is coiled around a to-be-measured trunk aslant through a spring hoop, the upper end of the water receiving part is provided with an upward annular opening in the peripheral direction of the trunk, and the upper end edge of the annular opening is in tight contact with the surface of the to-be-measured trunk; andthe diversion part is connected with the metering mechanism. The trunk runoff measuring device has the advantages that the cost is low, the installation is simple, and a user can select the spring hoop of an appropriate length