To study the crack resistance of reactive powder concrete beams reinforced with GFRP bars,the experiments on flexural property of 8 reactive powder concrete beams reinforced with GFRP bars were carried out and cracking loads of this kind of beams were obtained.Refering to calculation method for cross-sectional crack resistance of steel-reinforced concrete beams,combining with tensile stress-strain relationship of reactive powder concrete,the calculation model for cross-sectional crack resistance of reactive powder concrete beams reinforced with GFRP bars were established.By the calculation and analysis,formula of plastic influence coefficient of sectional resistance moment was gained which has the linear relationship with reinforcement ratio.The calculation data of cracking loads obtained by the formula and the test data of cracking loads were contrasted and the results show that they are in good agreement.Accordingly,the calculation method for cross-sectional crack resistance of reactive powder concrete beams reinforced with GFRP bars is achieved.