Abstract: When the tubular textile composite material is used in rehabilitating the liner of a pipeline,it must withstand the pressure exerted by the medium in the pipeline,so its pressure withstanding properties directly affects the rehabilitation result.Based on the special mechanical property requirements of the tubular textile composite material and its own structural features,and through the test of its tensile property,the paper established a mathematical model to calculate the tensile strength /width/ bursting pressure and determine their relationships.The experimental results have proved that the precision of the model is high;when the diameter of the old pipeline and the size of the corrupt hole have changed,the model can calculate the maximum pressure that the tubular textile composite material can withstand.So it has significance in providing a guideline for the application of tubular textile composite materials.