Lunar-based extreme environment large-depth fidelity coring device

The invention relates to the technical field of rock drilling, and particularly discloses a moon-based extreme environment large-depth fidelity coring device. Comprising a coring bit, a coring cylinder, an inner interlayer, a lining sleeve, a film coating mechanism and a sealing device, wherein the coring bit is provided with a mounting cavity and a follow-up protective liquid channel; the coring cylinder is sleeved in the mounting cavity; an annular cavity is formed between the inner interlayer and the coring cylinder; the follow-up protection mechanism is coaxially mounted at one end, far away from the sealing device, of the coring bit and is matched with the follow-up protection liquid channel for use; the coring cylinder is rotationally connected with the coring drill bit; the film covering mechanism is in transmission fit with the lining sleeve and used for controlling the lining sleeve to move in the axial direction of the film covering mechanism. According to the method, well wall cementation hole prot