The fiber Bragg grating(FBG) has the advantages of small size, high accuracy, corrosion resistance, and the immunity to electromagnetic interference. It has been widely used in civil engineering. But in the actual monitoring, we should bond the FBG with the substrate via the bonding material to achieve the purpose of the measurement. The different ways of paste will have different impacts on measurement of stain. By comparing the results of different surface strain measurement mode for fiber grating paste,it has been found that the solidification shrinkage of bonding layer will result in bond strength.The greater the bond strength is, the smaller the error between the strain measurements and the actual strain.