Abstract: This paper presents a simulating experimental stand for the study of capillary experiment and the analysis of two-phase flow characteristics of refrigerant F-11 (freon-11 ) in a piece of capillary. Based on the basic differential coupled equations and the experiment, the function curves about the transportation capacity and the relative physical measures are given. A comparison is made between the theoretic calculation and the experiment results of capillary two-phase flow at the same.