The invention relates to an oil, gas and water three-phase liquid mixing device which is characterized by comprising an upper joint, wherein the upper joint is connected with an oil transportation pipe, the other end of the upper joint is connected with a disturbing flow device, and the other end of the disturbing flow device is connected with a lower joint used for connecting an oil outlet pipe;the disturbing flow device comprises a plurality of disturbing flow sleeves in threaded connection, each distributing flow sleeve is internally provided with a cylindrical central through hole the inner diameter of which is same as the inner diameters of the oil transportation pipe and the oil outlet pipe, and two distributing flow plates are arranged in the central through hole at intervals; each distributing flow plate is of a circular ring shape and is provided with a plurality of distributing flow sheets at intervals along the circumferential direction. The oil, gas and water three-phase liquid mixing device is simple in structure, convenient to dismount and mount and good in oil, gas and water mixing effect and can be widely applied to the oil, gas and water three-phase liquid mixingprocess.