The red polymer emitting device was made with new-style ring metal Ir (Ⅲ) complexes (btp)2Ir(acam) (“btp” is 2- benzo thiophene pyridine and “acam” i s 3- acetyl camphor) as phosphorescence luminous object and mixed in host materials,PVK+30%PBD.Mean while,the complexes′ ultraviolet absorption light,photoluminescence light,photoluminesc ence efficiency, thermal stability and cyclic voltammograms cure in the solution were tested.The results show that the introduction of steric hindrance base group,3-acetyl camphor can improve the complexes′ fluorescent light and quantum efficiency in the solution.The device′s test resu lts show that with the doping concentration of 5%,the strongest emission peak of the electroluminescen t spectra is located at 623nm and the trigger voltage is 7.2V.When it is 15.7V,the greatest brig htness of the device is 4127cd/m²,the greatest luminance efficiency is 4.1cd/A when it is 11.6V,and the color coordinates of CIE are (0.66,0.32).