The utility model discloses an alternating current frequency conversion electric drive drilling machine for drilling and in a top drive and rotating disc combined drilling mode. A derrick and a top drive are arranged on a platform, a driller room, an electric control room, a rotating disc and a main winch are further arranged on the platform, the platform comprises a working layer and a fixed control device layer which are designed vertically, and an upper racking platform and a lower racking platform are arranged in the middle of the derrick. The top drive, the rotating disc and the main winch are driven by an alternating current frequency conversion motor respectively. The top drive is directly driven by a direct driving motor, and the rotating disc is directly driven by a rotating disc motor. A main motor of the main winch drives a coiling block through a main reduction gearbox to conduct downward drilling, and a bit feed motor of the main winch drives the coiling block through a two-stage reduction gearbox to conduct bit feeding. The drilling machine adopts an alternating current frequency conversion motor to drive operation, has large torque rotating disc drilling or comprehensive drilling capability and high speed top drive coring drilling composite drilling capability, a frequency converter is utilized to conduct control to achieve high efficiency low energy consumption operation of the composite drilling mode, and the operation requirement of scientific drilling can be met.