Abstract: In order to improve the dredging effect of the blocked mining-induced fracture field by pulsating hydraulic scouring technology, the flow characteristics of pulsating water flow in fracture and the influence of pulsating hydraulic parameters on the migration mass of deposited particles in the fracture were studied; the relationship between the coefficient of pressure pulsating intensity and the migration mass of deposited particles in fracture was studied. The results show that the fluid flow rate and pressure difference in the fracture fluctuated under the pulsating hydraulic condition, the average velocity is smaller than that of constant flow. Also, the average velocity decreases significantly with the increase of pulsating amplitude, and increases slightly with the increase of pressure pulsating period; the variation of the migration mass of deposited particles with the pulsating amplitude conforms to the law of linear increase, and decreases slowly with the increase of pulsating fluctuation period; in addition, the coefficient of pulsating fluctuation intensity increases with the pulsating amplitude increasing and decreases with the pulsating fluctuation period increasing. Furthermore, the increase of the pulsating fluctuation intensity coefficient is the fundamental reason for the significant improvement of the migration mass of deposited particles in fracture under pulsating hydraulic conditions.