Disclosed in the utility model is a radio frequency interference suppression apparatus for a pulse system-based ground penetrating radar. The radio frequency interference suppression apparatus comprises a support rod that is connected with support plates; the support plates are connected with absorption plates; and a radar antenna is installed on the support rod. According to the radio frequency interference suppression apparatus provided by the utility model, on the basis of the groove design, the range and direction of the shielding can be adjusted timely. The microwave absorbing coatings and shielding absorbing coatings of the absorption plates enable electromagnetic clutters to be effectively absorbed and to be converted into the heat energy, thereby effectively avoiding high-frequency oscillation between shielding cavities and the receiving antenna.