The integrated materials of anti/de-icing-stealth have important research value and application potential in aerospace, especially in the field of UAV. In this study, graphite/silicon based gel composites were prepared by siloxane coupling reaction. The results show that when the graphite content is 40%, the hydrophobic angle of the silicon based gel is 109.3 °± 2.3 °, the temperature in the center of the sample is 69.6 ℃ (heated at 100 ℃ for 60 s), the maximum tensile strength is 0.512 1 MPa and the effective absorption bandwidth is 6.83 GHz@1.61 mm (9.70~16.53 GHz). The intrinsic coupling mechanism of hydrophobic, thermal conductive and microwave absorbing properties of silicon based gel was clarified by characterizing the microscopic factors such as conductivity and defects of gel. This study provides a simple material design strategy for achieving both stealth and anti icing functions of drones simultaneously.