Inner core tube automatically replacing deep sea multipoint core drilling rig

The utility model discloses an inner core tube automatically replacing deep sea multipoint core drilling rig, consisting of a frame-type machine frame, an umbilical cord cable hanging putting device for the drilling rig, a changing inner tube mechanism automatically replacing inner core tube, a dynamic force lithium battery group with high power, an external DC/AC inverter, a liquid filled alternating current machine, a hydraulic pump station, a hydraulic valve box, a support leg oil cylinder, a main support leg, an auxiliary support leg, a penetrating hydraulic drilling power mechanism, the compensating and rod stabilizing mechanisms of the penetrating hydraulic drilling power mechanism, and a pin type or hydraulic oil cylinder propelling fork pad type clamping and drilling safe escape device. The drilling power mechanism and the compensating and rod stabilizing mechanisms of the drilling power mechanism consist of a holder for the drilling tool, a penetrating drilling power head and the through shaft of the penetrating drilling power head which is conducted to insert, pull and change tubes, a side-layout type hydraulic motor driving the through shaft to turn, the power head drilling into the oil cylinder, and a compensating machine frame and the compensating oil cylinder of the compensating machine frame. The utility model can realize the coring work of the launching once and the multiple replacing the inner tube with simple and effective functions and can adapt the variation of the submarine relief with stable operation. The mechanical clamping drilling safe escape device has simple structure and reliable operation.