Textile Reinforced UHTCC (TRU) is a kind of composite material with superior performance. Therefore, the bending-tensile corresponding relationship of TRU composites was studied in this paper. The tensile test and four-point bending test of TRU composites were conducted. Based on the test data and the material constitutive model, the formula of bending-tensile relationship of TRU composites was established. The results show that the theoretical values obtained by the calculation formula are in good agreement with the test values. Therefore, the four-point bending test can replace the uniaxial tensile test as a simple and practical test method to evaluate the mechanical properties of TRU composites.