Mold core for solving breakage of core head thereof, and preparation method of precision cast component

The invention discloses a mold core for solving breakage of a core head thereof, and a machining method. The machining method comprises the following steps of: designing a cast blank drawing; designing and manufacturing a mold core according to the cast blank drawing, wherein the mold core comprises a vane root core head, a mold core vane body and a mold core rod that are sequentially arranged from bottom to top, and the mold core rod extends out of the designed end part of a hollow vane; designing and manufacturing a wax pattern mold and a mold insert according to the cast blank drawing, wherein the mold insert is provided with a hole which is installed in a manner of being matched with the mold core rod; putting the mold core into the wax pattern mold and then connecting the mold insertwith the mold core rod of the mold core; pressing a wax pattern inside the wax pattern mold; and taking out the wax pattern after the wax pattern is pressed. The machining method disclosed by the invention has the beneficial