The utility model discloses a monitoring system anti-interference filter with center frequency at 24MHz and bandwidth 2MHz; the monitoring system anti-interference filter comprises capacitors, a resistor, and inductor elements; a connecting mode is that a signal input end capacitor C1 is connected in parallel with an inductor L1; series capacitors C2 and C3 are connected in parallel with an inductor L2; series capacitors C4 and C5 are connected in parallel with an inductor L3 and then outputted through a series resistor. The filter can carry out isolation anti-interference process to the signals collected by the monitoring system, external interference noises un-complying with demands are prevented, thereby realizing anti-interference effect.