Disclosed is a handheld power machine for an orthopaedic drill and saw the machine at least comprising a handle housing (1) a holding assembly (4) for holding a tool assembly a power motor (2) for outputting power and driving the tool assembly to drill and saw and a switch assembly (5) for controlling the power output of the power motor (2) the power motor (2) having an external power supply. The external power supply can utilize a large scale accumulation battery or mains supply such that it is possible to prevent the conditions of power off or insufficient voltage during a surgical operation ensuring the smooth operation of surgery reducing the heat generated by the handle and reducing the mass of the whole equipment. The handheld power machine for an orthopaedic drill and saw is convenient and flexible to operate and can improve the efficiency of the surgical operations.
