Abstract: This paper studies the problem that the mobile roof pedrail powered support is being desalinated in Wongawilli short-wall mining, and introduces the process from import to localization of support and its application effect. In addition, this paper analyzes its configuration and necessity in different short wall mining methods, and optimizes the calculation formula of support resistance on the basis of previous achievements. Through numerical simulation, the support resistance of the support in different positions of the same branch entry and different width of cut pillars, and the distribution and variation law of each single mast pressure were studied. Then the influence of goaf side and entity coal side on mast pressure was obtained. The relationship between the support resistance and the main influencing factors is comprehensively analyzed, and the column pressure is monitored and analyzed in the field practice, which verifies the correctness of the theoretical analysis. Finally, the key practical technology of crawler hydraulic support in fractured zone is given. The results show that the roof caving without cutting of the branch roadway behind the hydraulic support is still an important guarantee for the safety of short wall mining. The theoretical calculation formula of support resistance . And the pressure of the four columns has a positive correlation with the size of the goaf and the width of the coal pillar between the knives. The pressure of columns in goaf side is obviously higher than that in entity coal side. The change of side pillar pressure is the key to analyze and predict the change of roof pressure and load in goaf. In addition, the actual working resistance of side column is smaller than that of simulation. The support crusing can be solved by the following ways, such as strengthening roof support, reinforcement support of caving gangue pile, ground anchor support, grouting reinforcement, and at the same time, the support is pulled out by the traction force of the prop pulling hoist.