The utility model relates to a dry quenching waste heat generating load automatic regulating system, and belongs to the field of a coking dry quenching waste heat recovery utilization safety technology. The system comprises a rotation speed controller, a DCS system connected with a generator set, and a man-machine operation unit for monitoring the steam condition of a dry quenching turbo generator set in the DCS system. The rotation speed controller receives a regulating instruction, performs fixed value adjustment and then emits a control signal to a servo amplifier in the system, the servo amplifier regulates a turbine inlet steam regulating gate, and the man-machine operation unit is provided with two working modes, i.e., an automatic regulating mode and a hand-operated regulating mode. According to the utility model, the automatic regulating control mode is designed, a man-machine operation interface is created, and the generating load can be regulated according to change of the steam condition, such that full automatic regulation of a dry quenching generating load is realized, and the problem is solved that generating load regulation is carried out through manual operation according to the change of the steam condition and automatic regulation is not realized in the prior art.