This article mainly focuses on the field of geological core drilling engineering， guided by the concept of green exploration work， and is aimed at the application practice of modular drilling machines and flushing fluid treatment equipment. It introduces the construction characteristics of modular drilling machines and their advantages in forest covered areas， analyzes the adaptability of drilling machines to diverse engineering needs through module combination. At the same time， it studies the importance of flushing fluid treatment technology， including flushing fluid performance requirements， recycling mechanism， and corresponding treatment process， and discusses the significance of scientific and reasonable flushing fluid treatment methods for protecting the environment， providing reference for promoting the green development of the drilling industry.