The fine-structure energy levels and transition parameters of Cu-like Au50+ have been calculated by using the relativistic multi-configuration method(GRASP 2,1992) with the corrections of finite nuclear size, Breit and QED. The results obtained are in good agreement with the experimental data available and better than those of the previous calculations. It can be concluded that the QED correction should be taken into account further, which greatly improves the accuracy of the calculated 4s—4p transition wavelengths.