The machine is composed of a plurality of submersible power heads in rows. When working, the power device rotates in the forward and reverse directions to offset each other. Torque rotary cutting; At the same time, a submersible sand pump is used to discharge the drilling slag out of the groove to form a groove. Mainly used for underground water cut-off wall, retaining wall, deep basement, underground parking lot, port wharf, underground railway, mine and other projects.