Abstract: The reciprocity between unstable flow of gas-liquid two-phase flow and pipeline distortion chan9es the characteristic of aliquid pipeline system greatly and accelerates a process in research of liquid-solid coupling of a gas-liquid two-phase flow pipeline.The paper summarizes the research situation in liquid-solid coupling of single phase flow pipelines at home and abroad, and expounds its research stress on rule of severely slag flow in gas-liquid two-phase flow of offshore riser and its liquid-solid coupling problem, and states a calculating method for commonly used values in liquid-solid coupling of flow pipelines.Also, issues existed in research of liquid-solid coupling of transient flow in ges-liquid two-phase flow are analyzed and its developing prospect are given.