Abstract: In order to investigate the flexural behaviors of precast hollow-core slabs strengthened with textile- reinforced highly ductile concrete (TR-HDC), 1 reference slab and 11 strengthened slabs were tested under four-point flexural loading. The effects of adding PVA fibers into the matrix or not, the textile type and the textile numbers on the failure mode, crack distribution, load-deflection curve, energy dissipation and strain of precast hollow-core slabs were investigated. The results show that the crack width of strengthened slabs decreases, while the number of cracks increases. The cracks are thin and dense. This kind of multi-crack behavior can effectively dissipate energy. TR-HDC can improve the flexural stiffness of the strengthened slabs after cracking, and the greater the elastic modulus of the textile, the more obvious the improvement. TR-HDC can significantly improve the flexural capacity and deformation capacity of the strengthened slabs. The increase in peak load is 28%~132%, and the increase in peak deflection is 103%~331%. Based on the assumption of plane section, the formulas for calculating the flexural capacity and deflection of TR-HDC strengthened slabs were given. The calculated values are in good agreement with the experimental values, and the dispersion is small, which can provide theoretical reference for practical application.