The invention discloses a bottom exploring judgment method for a processor of an offshore deep layer cement coil stirring ship. According to summarization, due to the fact that the load and the torqueof the processor in operation in a soft oil layer and a hard soil layer have obvious sudden change, bottom exploring judgment is performed by means of the changing values of the load and the torque of the processor. The load and torque values of the processor are recorded in experiment carried out before construction, and in combination with distribution condition data of soil layers in geological exploration, the load and torque changing threshold values of the processor are set. Because of false bottom exploring possibly caused by nonuniformity of spatial distribution of seal foundation soil layers and interference and other accidental factors in the construction process, multi-time bottom exploring is set to confirm the bottom exploring judgment.