The invention discloses a lowpass filtering bridge for eliminating parasitic parameters of capacitors. The lowpass filtering bridge is composed of the capacitors, a resistor and an inductor. The filtering bridge comprises four bridge arms. The capacitors C1 and C2 on the bridge arm 1 and the bridge arm 3 are mainly used for filtering high frequency signals. The resistor and the inductor on the bridge 2 and the bridge 4 are used for eliminating parasitic equivalent series resistance ESR and parasitic equivalent series inductance ESL of the capacitors themselves. According to the lowpass filtering bridge, through adoption of a bridge type connection method, the parasitic ESR and ESL of the capacitors themselves are eliminated through the resistor and the inductor on the bridge arms, so the influences of the parasitic parameters of the capacitors are reduced or eliminated, and the upper limit working frequency of the capacitors is improved. According to the lowpass filtering bridge, the influences of the ESR and ESL resulting from factors such as materials and structures of the capacitors themselves on the filtering effect can be eliminated to a great extent, the high frequency performance of the capacitors is improved, and the lowpass filtering bridge is characterized by simple use and clear effect.