Abstract: Based on the present status of the large scale mining in the low group seam in the south part of Hebei Province and the mine water prevention and contr ol technology in deep mine, a safety mining technical guidance principle of“advance active, regional control, full reconstruction and pressure dropping with pressurized water was provided.In combination with the daily matured directional drilling technology and the progress of the site directional drilling experiment, the paper preliminari ly discussed the shortages of the previous mine water prevention and control guidance principles for the pressurized mining in the lower group seam and provided the g uidance principles and technical countermeasures of the pressurized mining in the lower group seam and the deep depth mine.