The waste flushing fluid generated during geological drilling often contains pollutants such as drill cuttings and various chemical treatments. These pollutants are characterized by high chromaticity, high COD, and high suspended solids. If directly discharged, they will affect the surrounding soil, water quality, and biological environment. With the in - depth implementation of the concept of green exploration in the field of geological drilling, the diaphragm pressing waste slurry treatment device has emerged and played an important role.This paper mainly introduces the TGYG type diaphragm pressing waste slurry treatment device, which is designed based on the concept of a small skid - mounted modular structure. It has been successfully applied in medium - deep hole geological drilling in Zhumadian, Henan. Through on - site harmless treatment of the waste flushing fluid, the liquid content of the separated solid phase is reduced to less than 20%, significantly reducing the volume and mass of the waste flushing fluid, reducing environmental pollution, and promoting resource recycling. It provides valuable practical experience for the harmless treatment of waste flushing fluid in geological drilling and can effectively contribute to the full implementation of green exploration work in the new round of strategic action for breakthroughs in mineral exploration.