Pressure adjusting system for self-feeding drilling following stratum rock appearance recording device

The invention discloses a pressure adjusting system for a self-feeding drilling following stratum rock appearance recording device. The pressure adjusting system comprises an air bag, a liquid bag, anair pump, an air cylinder, a pressure sensor, an air-liquid dynamic adjusting system placement chamber and a supporting plate; the air bag and the liquid bag are located in the air-liquid dynamic adjusting system placement chamber, in addition, the air bag is located above the liquid bag, and the liquid bag is filled with colorless transparent insulated liquid; the air pump is placed in the air-liquid dynamic adjusting system placement chamber; and the air pump and the air bag, the air pump and the air cylinder as well as the air pump and the pressure sensor are connected through pipelines. According to the pressure adjusting system, through the air-liquid closed circulation and real-time dynamic adjusting principle, in the drilling process, change of the intensity of pressure of the interior and the exterior of