Abstract: Based on the unmanned lunar surface sampling return mission of Chang’E-5 drilling subsystem, the coring dynamics of spiral drill in shallow loose lunar regolith were studied by experimental method and FEM. Research results are described as follow: the WOB（Weight Of Bit）, which is controlled by drilling parameters, is a key parameter in coring dynamics and can influence the effect of coring; The relationship of powder discharge pressure and core resistance is a key factor controlling the sampling effect of auger. Our results improves our understanding of drilling dynamics, therefore will help the designing drilling system for chang’e-6 and other future deep space explorer project.