There　is　interaction　between　multiple　power　system　stabilizers　in　the　wide-area　power　grid,　which　affects　the　control　effect　of　the　whole　system.　Therefore,　a　coordinated　design　method　of　multi-objective　wide　area　damping　controller　based　on　bat　algorithm　was　proposed.　This　method　made　use　of　the　population　diversity　of　bat　algorithm　to　keep　the　algorithm＇s　ability　of　continuous　optimization　in　the　iterative　optimization　process,　which　ensures　that　the　algorithm　has　good　convergence　and　accuracy.　Taking　the　real　part　and　damping　ratio　of　the　electromechanical　oscillation　mode　as　the　objective　function,　the　parameter　optimization　problem　of　the　stabilizer　of　multi-machine　power　system　was　reduced　to　the　multi-objective　optimization　problem　with　inequality　constraint.　The　simulation　results　show　that　the　proposed　method　can　improve　the　eigenvalue　distribution　of　the　system＇s　weak　electromechanical　mode,　effectively　suppress　the　low　frequency　oscillation,　and　has　good　control　effect　and　robustness.　©　2019,　Zhejiang　University　Press.　All　right　reserved.