The invention relates to the fields of organic synthesis and pharmaceutical chemistry, and specifically relates to a cleistanone O-(benzimidazolyl) ethyl derivative, a preparation method thereof, and applications of the cleistanone O-(benzimidazolyl) ethyl derivative in the preparation of drugs for preventing or treating pancreatic fibrosis. A novel cleistanone O-(benzimidazolyl) ethyl derivative is synthesized, and a preparation method thereof is disclosed. Pharmacology experiment results show that the provided cleistanone O-(benzimidazolyl) ethyl derivative has an effect on preventing or treating pancreatic fibrosis, and thus the cleistanone O-(benzimidazolyl) ethyl derivative is advantageously used to produce drugs for preventing or treating pancreatic fibrosis.