The embodiment of the invention provides an electronic device middle frame machining method and an electronic device. The method comprises the steps that an aluminum alloy plate is prepared into an aluminum alloy component; based on machining parameters, a tool is adopted to machine a middle frame to be machined along the preset curve path, the preset curve path is the 3D curve, and the machiningparameters are composed of concave and convex value of all points, detected by a probe, in the frame to be machined of the aluminum alloy assembly; the machined aluminum alloy assembly is subject to anodic oxidation treatment. Machining is carried out on the middle frame according to the preset curve path, due to the fact that due to the machined preset curve path, the middle frame in the aluminumalloy assembly becomes stereoscopic, and the visual effect of the middle frame of the aluminum alloy assembly is further thinner.