The utility model relates a mechanism for dumping slurry on a soil erosion real time monitoring instrument, the technical problems which need to be solved are that the provided slurry dumping mechanism needs enabling a weighing tipping bucket to automatically dump slurry and automatically return to the original position, and the mechanism needs having the characteristics of high measuring accuracy and high working efficiency. The technical proposal is that an automatic water dumping mechanism of the soil erosion real time monitoring instrument comprises a rotation axis capable of rotating which is arranged on a weighing support in the horizontal direction, and a motor which is fixed on the weighing support, wherein a weighing tipping bucket is fixed on the rotation axis, and one end of the rotation axis is further connected with a tipping bucket shifting block, and a tipping bucket deflector rod is fixed on a tipping bucket motor shaft, which is convenient to apply force the tipping bucket shifting block and to enable the weighing bucket to rotate. The tipping bucket shifting block is movably positioned on one end of a crank rod, the other end of the crank rod is fixed on the rotation axis, the weighing support is further provided with a locking device which is used for positioning the weighing tipping bucket.