Mining head suitable for exploiting deep-sea cobalt-rich crust

The invention relates to a mining head suitable for exploiting a deep-sea cobalt-rich crust. The mining head comprises a pick component and is characterized in that the pick component is arranged on the wall of a milling and digging roller, a spindle penetrates the milling and digging roller and is fixed to a milling and digging rack, a milling and digging motor is fixed to the milling and diggingrack, the milling and digging rack is further provided with a compensator, a first leather bag and first springs are arranged in the compensator, the first leather bag is filled with oil, the first springs are arranged on two sides of the first leather bag, and the bottom of the compensator is provided with a compensation oil port; two ends of the spindle are provided with bearings, a left bearing cavity exhaust port is arranged in a left bearing cavity, a right bearing cavity exhaust port and a right bearing cavity oil supplementing port are arranged in the right bearing cavity, the spindleis provided with an oil ho