Abstract: In this paper, the author analyzed the cycle of surface pre-grouting, found that unstable of drilling fluid properties and high materials consumption in drilling process were caused by dilution of water, physical, chemical pollution of grouting materials. Put forward proposals to reduce drilling fluid materials consumption from process control, using new materials and management control. Good engineering effects were obtained by using three level control processes.

Key words: Horizontal Hole, Surface Pre-grouting, Drilling Fluid