Conductive conjugated microporous polymers (CMPs) were prepared by a micropore-confined polymerization strategy, and show excellent electromagnetic waves absorption performance. Display omitted •Confined polymerization of pyrrole monomer in micropores (diameter ≤ 2 nm)•Conductive conjugate microporous polymers (CMPs) was synthesized.•Conductive CMPs show enhanced dielectric loss toward microwaves.•Maximum effective absorbing width of conductive CMPs reaches 7.52 GHz. Endowing conjugate microporous polymers (CMPs) with appropriate electrical conductivity greatly expands the application scope of CMPs, especially in electronic-related applications. In this paper, we report a strategy to prepare electrically conductive CMPs via confined polymerization of pyrrole in micropores. The conductive CMPs shows remarkably enhanced dielectric loss behaviors toward microwaves, and exhibits high electromagnetic absorption (EMA) performance, where the effective EMA bandwidth reaches 7.52 GHz and the maximal absorption achieves −59.7 dB. A confining model is adopted to explain the reason for the enhanced dielectric loss of conductive CMPs. This research expands application scope of CMPs in areas of conductive materials.