Reverse　design　is　a　frontier　direction　in　the　optical　research　field.　In　this　work,　reverse　design　is　applied　to　the　design　of　terahertz　devices.　We　have　employed　direct　binary　search　(DBS)　and　binary　particle　swarm　optimization　(BPSO)　algorithms　to　design　pixel-type　terahertz　band-pass　filters,　respectively.　Through　a　comparative　analysis　of　the　designed　devices,　we　found　that　BPSO　algorithm　converged　faster　than　DBS　algorithm,　and　the　device　performance　is　better　on　out-of-band　suppression.　We　have　fabricated　a　sample　utilizing　femtosecond　laser　micromachining　and　characterized　it　by　terahertz　time-domain　spectroscopy.　The　experimental　results　were　consistent　with　the　finite　difference　time　domain　(FDTD)　simulation.　Our　method　can　simultaneously　optimize　multiple　characteristics　of　the　band-pass　filters,　including　the　peak　transmittance,　out-of-band　transmittance,　bandwidth,　and　polarization　stability,　which　can　not　be　achieved　by　traditional　optical　design　methods.　©　2022　Optica　Publishing　Group　under　the　terms　of　the　Optica　Open　Access　Publishing　Agreement