Machining method of turbine working blade

The invention discloses a machining method of a turbine working blade, which comprises the following steps: a, unifying positioning standards of a turbine working blade blank and turbine working blade machining; b, fixing and positioning the turbine working blade blank, and performing machining according to the positioning standards; c, performing grinding to form tenon teeth, positioning machined tenon teeth, machining an upper edge plate and a lower edge plate of the turbine working blade and sawteeth of a blade tip shroud; and d, performing heat treatment and shot blasting of the machined turbine working blade to form the turbine working blade. Machining and blank standards are unified to realize the consistency of a blank mould positioning point and a machined tenon positioning point, so that an error caused by standard disunity is eliminated, the frequency of standard conversion is reduced, the conversion precision is increased, and the designed blade profile positional tolerance requirement is met; and the precision of coordinate positional tolerance evaluated by building a standard after machining is improved. The machining method is suitable for technological equipment and manufacturing of aero-engine turbine working blades.