The invention relates to a hydraulic model, in particular to a hydraulic model for simulating a river suspended load sediment distribution rule with a muddy water slot. The IPC (International Patent Classification) number of the hydraulic model is E02B1/02, and the hydraulic model belongs to the field of water conservation. Adopted vertical measuring point sand content sampling equipment comprises multiple sampling pipes; the water inlets of the sampling pipes are arranged at different heights of the same vertical straight line; after extending out of the water surface, the upper ends of the sampling pipes are fixed on a fixing device; the upper end outlet of each sampling pipe is connected with one independent guide pipe; the part, extending out of a experiment water slot, of each guide pipe is provided with a valve; a positive and negative bidirectional air pressure valve is connected to the side wall of the guide pipe above each valve; the tail end of each guide pipe is connected with one independent online sand content measuring instrument; the fixing device is provided with a longitudinal adjusting bolt and a horizontal adjusting lead screw for performing longitudinal and horizontal distance adjusting. According to the suspended load sediment distribution hydraulic model, the sampling precision and efficiency of multiple vertical measuring points in the same section of the sand content in the model experiment can be greatly improved, the model has great promotion action for the precision and completeness of experiment data, and the significance is huge.