A milling method for machining metallic member using lathing and milling, characterized by comprising: providing a machine comprising a machine support, a worktable, a moving device, a lathe feeding mechanism, and a milling feeding mechanism, wherein the worktable is positioned on the machine support; the moving device is slidably assembled to the machine support along a first direction and located above the worktable, the lathe feeding mechanism and the milling feeding mechanism are slidably assembled to the moving device along a second direction perpendicular to the first direction, the lathe feeding mechanism comprises at least one feeding assembly and a lathe tool connected to the at least one feeding assembly, the at least one feeding assembly is configured for driving the lathe tool to move along a third direction substantially perpendicular to the first and second direction reciprocally, the milling feeding mechanism comprises a milling cutter and is configured for driving the milling cutter to move along the third direction; positioning a metallic member on the worktable, the metallic member comprising a top portion and a peripheral sidewall extending from a peripheral edge of the top portion, the peripheral sidewall comprising an end edge away from the top portion; applying the worktable to rotate with the metallic member; controlling the lathe tool to move backwards and forwards at a high frequency along the Z-axis toward the metallic member to machine curved surfaces of the top portion of the metallic member circumferentially; moving the lathe tool by the moving device along a predetermined path relative to the worktable to machine curved surfaces of the top portion of the metallic member; holding the metallic member to stop rotate, and moving the lathe tool away from the metallic member; driving the milling cutter to rotate, and to resist the peripheral sidewall of the metallic member; moving the milling cutter along a predetermined path, simultaneously controlling a feed of the milling cutter relative to the metallic member; and applying the worktable to rotate the metallic member to enable the end edge of the peripheral sidewall to face the milling cutter, and chamfering the end edge by the milling cutter along a predetermined path, simultaneously controlling a feed of the milling cutter relative to the metallic member. providing a machine comprising a machine support, a worktable, a moving device, a lathe feeding mechanism, and a milling feeding mechanism, wherein the worktable is positioned on the machine support; the moving device is slidably assembled to the machine support along a first direction and located above the worktable, the lathe feeding mechanism and the milling feeding mechanism are slidably assembled to the moving device along a second direction perpendicular to the first direction, the lathe feeding mechanism comprises at least one feeding assembly and a lathe tool connected to the at least one feeding assembly, the at least one feeding assembly is configured for driving the lathe tool to move along a third direction substantially perpendicular to the first and second direction reciprocally, the milling feeding mechanism comprises a milling cutter and is configured for driving the milling cutter to move along the third direction; positioning a metallic member on the worktable, the metallic member comprising a top portion and a peripheral sidewall extending from a peripheral edge of the top portion, the peripheral sidewall comprising an end edge away from the top portion; applying the worktable to rotate with the metallic member; controlling the lathe tool to move backwards and forwards at a high frequency along the Z-axis toward the metallic member to machine curved surfaces of the top portion of the metallic member circumferentially; moving the lathe tool by the moving device along a predetermined path relative to the worktable to machine curved surfaces of the top portion of the metallic member; holding the metallic member to stop rotate, and moving the lathe tool away from the metallic member; driving the milling cutter to rotate, and to resist the peripheral sidewall of the metallic member; moving the milling cutter along a predetermined path, simultaneously controlling a feed of the milling cutter relative to the metallic member; and applying the worktable to rotate the metallic member to enable the end edge of the peripheral sidewall to face the milling cutter, and chamfering the end edge by the milling cutter along a predetermined path, simultaneously controlling a feed of the milling cutter relative to the metallic member.