In view of the problems that the current tactile sensors applied to electronic skin cannot have flexibility and multi-modal information perception, a finite element simulation and experimental study of the material recognition function of two fiber Bragg grating (FBG) tactile sensors encapsulated in the same polymer sensing unit is carried out. Firstly, the principle of the FBG tactile sensor and the mechanism of material recognition of the contact object based on thermal transfer are derived; then, the thermodynamic simulation analytical experiments of the encapsulated material with different contact objects are carried out; finally, the experimental system platform is built and the material recognition of FBG flexible tactile sensor is investigated experimentally. The simulation and experimental results show that when the contact object is aluminum, iron and plastic at 70℃ respectively, the maximum values of the central wavelength shift of the FBG temperature sensor due to thermal transfer are: ΔλB1 = 0. 588 9 nm, ΔλB2 = 0. 277 3 nm and ΔλB3 = 0. 169 2 nm, and the rate of change of the central wavelength shift with time in the first 10 seconds of exposure are k1 = 31 pm/ s、k2 = 19 pm/ s and k3 = 6 pm/ s. Expanding the recognition function of the contact object material of the FBG tactile sensor can realize the perception of more modal information of the electronic skin, which has certain application value.