A cutting machine (100, 200), comprising: a pedestal provided with a back plate for fixing a work piece; an operating turntable pivotally supported on said pedestal, comprising a linear saw blade receiving groove in the direction from distal to proximal, and wherein either said back plate is provided in the middle upper portion of the pedestal; a sliding path disposed at its distal end side along or parallel to an extension line of said saw blade receiving groove; a slider slidably engaged with said sliding path so as to form a sliding assembly with said sliding path; or said back plate is provided on the proximal end side of the pedestal, and a rocker arm seat is disposed at distal end side of the operating turntable; characterized by a rocker arm comprising an upper rocker arm and a lower rocker arm having a cylindrical shape in the position of engagement with each other, the lower end of said lower rocker arm is hinged with and locked to said slider or said rocker arm seat, thereby making it adjust an angle and making it be locked in left-right direction with regard to said operating turntable, said upper rocker arm concentrically disposed on said lower rocker arm, said upper rocker arm is provided with sliding path holes; a pulling rod passing through said sliding path holes and sliding engaged with said sliding path holes, comprising a connecting seat provided at its proximal end; a cutting machine head assembly hinged at its distal end with said connecting seat of said pulling rod, provided with a handle at its proximal end, thereby making it pivot up and down with regard to said pulling rod by applying force to said handle, which comprises a main body, a motor securely fixed with said main body, and a circular disk saw blade connected to a motor spindle or a driven shaft driven by the spindle through a center hole thereof, wherein the plane on which said circular disk saw blade is located corresponding to said saw blade receiving groove in said operating turntable, wherein the other end of said pulling rod is provided with a connecting hole, an additional processing head frame is detachably inserted into said connecting hole, said additional processing head frame is mechanically connected with additional processing heads, and wherein the contact surfaces of said lower rocker arm and said upper rocker arm are connected by a concave-convex structure, and are fixed by a coupling bar in their center line, thereby attaining rotation of said upper rocker arm with regard to said lower rocker arm and thus attaining radial engagement and axial limiting and fixation with respect to each other. a pedestal provided with a back plate for fixing a work piece; an operating turntable pivotally supported on said pedestal, comprising a linear saw blade receiving groove in the direction from distal to proximal, and wherein either said back plate is provided in the middle upper portion of the pedestal; a sliding path disposed at its distal end side along or parallel to an extension line of said saw blade receiving groove; a slider slidably engaged with said sliding path so as to form a sliding assembly with said sliding path; or said back plate is provided on the proximal end side of the pedestal, and a rocker arm seat is disposed at distal end side of the operating turntable; characterized by a rocker arm comprising an upper rocker arm and a lower rocker arm having a cylindrical shape in the position of engagement with each other, the lower end of said lower rocker arm is hinged with and locked to said slider or said rocker arm seat, thereby making it adjust an angle and making it be locked in left-right direction with regard to said operating turntable, said upper rocker arm concentrically disposed on said lower rocker arm, said upper rocker arm is provided with sliding path holes; a pulling rod passing through said sliding path holes and sliding engaged with said sliding path holes, comprising a connecting seat provided at its proximal end; a cutting machine head assembly hinged at its distal end with said connecting seat of said pulling rod, provided with a handle at its proximal end, thereby making it pivot up and down with regard to said pulling rod by applying force to said handle, which comprises a main body, a motor securely fixed with said main body, and a circular disk saw blade connected to a motor spindle or a driven shaft driven by the spindle through a center hole thereof, wherein the plane on which said circular disk saw blade is located corresponding to said saw blade receiving groove in said operating turntable, wherein the other end of said pulling rod is provided with a connecting hole, an additional processing head frame is detachably inserted into said connecting hole, said additional processing head frame is mechanically connected with additional processing heads, and wherein the contact surfaces of said lower rocker arm and said upper rocker arm are connected by a concave-convex structure, and are fixed by a coupling bar in their center line, thereby attaining rotation of said upper rocker arm with regard to said lower rocker arm and thus attaining radial engagement and axial limiting and fixation with respect to each other.