The invention provides a hollow harmonic platform, and relates to the field of machining. The hollow harmonic platform comprises a fixture, a turbine worm output mechanism, a mounting tail base and arotating platform; the rotating platform comprises an outer shell and a speed-adjustable hollow motor; the speed-adjustable hollow motor comprises a hollow main shaft; a hollow explosion preventing pipe is inserted in the main shaft; a cable or an air pipe can be inserted from a first end to a second end of the hollow explosion preventing pipe in a hollow accommodating cavity; the speed-adjustablehollow motor is used for driving a flange plate on a flange plate module to rotate; the flange plate is used for mounting the fixture; a cylinder brake module is used for stopping rotation of the flange plate; the outer shell sleeves the speed-adjustable hollow motor; an output rotating shaft of the turbine worm output mechanism is connected with one side of the outer shell; and the other side ofthe outer shell is connected with a rotating end of the mounting tail base. The hollow harmonic platform solves the technical problem of easy interference of an air pipe or a cable of a traditional turntable during rotating of the turntable.