The effects of conductive materials such as carbon fiber （CF）， copper-coated steel fiber （SF）， multi-walled carbon nanotubes （MWCNTs） and carbon black （CB） on the bending strength， electric resistivity and flexural sensitivity of smart concrete with compounding functional filler were studied. Nine groups of comparative experiments were designed by changing the content of four functional materials， in which the two-electrode method and the three-point loading method were used to test the resistivity and flexural sensitivity of the samples. The results show that：（1）CF and SF are the main factors affecting the flexural sensitivity of the material. （2）When the content ratio of four conductive materials （CF∶SF∶MWCNTs∶CB） is 1.2∶4∶0.25∶4， the 28 d resistivity of the specimen is 887.5 Ω·cm； When the content ratio of four conductive materials is 0.3∶4∶0.5∶2， the flexural resistance of the specimen is the highest； When the deflection of the structural member reaches 4 mm， the maximum resistivity change rate is 158%， the flexural sensitivity is better， the correlation coefficients of the regression equation are all greater than 0.95， and the correlation between the resistance change rate and the deflection change of the material during the bending process is better.