Abstract: In rope rescue, the actual mechanical advantage of hauling system is less than the theoretical mechanical advantage, resulting in an overestimation of the rescue capability. Experiments are designed to test the efficiency of various types of pulleys， the effect of progress capture device (PCD) on pulley efficiency， and the efficiency of carabiner and I'D instead of pulley. Through the T-Method ，calculated mechanical advantage of the hauling system by substituting the test result of pulley efficiency. To provide data support for accurately evaluating the actual mechanical advantage of hauling system in rope rescue，and improving rescue effciency.

Key words: fire fighting, rope rescue, hauling system; effciency test； T-method