The steam turbine blade moulding surface is a quite complex kind of curved surface parts. Aimed at the problem of quite low production efficiency, due to the conservative cutting feed rate generally adopted in the processing, the idea of optimizing the cutting feed rate of the steam turbine blade moulding surface made from square steel of selected material was come up. Based on the analysis of cutting feed rate optimization principles during the rough machining and semifinishing of the steam turbine blade moulding surface, it was proposed of two optimization strategies, i.e., the constant material removal rate rough machining strategy and the constant thickness cutting semifinishing strategy. The experimental result proves that based on the constant material removal rate rough machining strategy and the constant thickness cutting strategy, the effects are obvious, the production efficiency is highly improved and the cost is also reduced.