Abstract: Long-distance and small-diameter mud-water balance jacking pipe grouting drag reduction construction technology includes grouting pipe removal, grouting hole plugging auxiliary system and long-distance pipe jacking grouting and drag reduction construction steps. The auxiliary system is composed of steel wire rope/traction rope, pulley and bracket, hoist, scooter, and walkie-talkie. During the jacking process of the small-diameter mud-water balance pipe jacking, in order to reduce drag, it is necessary to arrange grouting holes in different pipe sections, connect the grouting pipe and perform grouting to reduce drag, and at the same time pull the wire rope to randomly head forward to achieve the pipe jacking construction Reduce drag in the whole process. After the pipe jacking reaches the exit well, lift the pipe jacking machine, install the grouting pipe removal and grouting hole plugging auxiliary system, perform grouting removal and grouting hole plugging, and wait for the grouting pipe to be removed After the grouting hole is blocked, the auxiliary system is removed for recycling and reuse, which truly realizes the long-distance construction of small-diameter mudwater balance pipe jacking, greatly improving construction efficiency, good economic and social benefits, and good promotion and application value.