In order to investigate the effect of glue joint repair on the flexural deflection of carbon fibre composite laminates， tests were set up with two types of laps， step lap and diagonal lap， to investigate the flexural deflection of the glue joint by means of three-point bending experiments and digital image correlation （DIC） techniques. The results showed that the failure load and bending strength of the step-lap specimens were lower than those of the diagonal-lap specimens for the same lap length.The bending deflection of the specimens was related to the strength and lap length， with the longer the lap length， the higher the bending strength and the lower the bending deflection. This shows that the longer the lap length， the higher the strength of the glued laminate， but not conducive to the flexible deformation of the laminate.