In this paper, an unsteady drag measuring method for thin pipe is put forward which does not need too much amount of fluid. A thin pipe flow drag experiment table based on this method is setup. The experiment process and the data analysis of this experiment table are completed by use of computer. The feasibility and reliability of the method and the experiment table are verified by experiments of pure water flow in pipes with different diameters. The results show that the method has high precision when used in low Renolds number experiment and is suitable for the case of highcost flow experiment.