The invention relates to an oil well inflow controller, comprising a tube, a fluid passage and an outlet. The fluid passage comprises at least two slow flow passage units and at least two jet passage units, wherein the jet passage units and the slow flow passage units are alternately disposed along an extension direction of the fluid passage and flow area of the jet passage units is less than that of the slow flow passage units. When kinetic energy of oil is converted into pressure energy, energy loss is less; when kinetic energy of water is converted into pressure energy, energy loss is greater; therefore, water control capacity of the oil well inflow controller may be effectively improved.