We find unusual antiferromagnetic order in Cu heavily overdoped BaFeCuAs2 with the order wave vector at (0.5 0.5 1). This anitiferromagnetic signal cannot come from the parent compound directly, so understanding the origin of this AFM order can help us have a deeper understanding on the interplay between doping and magnetism. We propose to map out the whole magnetic spectrum with TOF measurement, and compare it with Co,Ni heavily overdoped BaFe2As2 which have been measured.