Soft Rock Tunnel horizontal jet grouting methods: by controlling the first bracket and the second supporting frame synchronization of the movable body about a longitudinal axis to change the position of the spray boom of construction of soft foundation treatment rig brand, repeat steps (1) to (3) to obtain a plurality of first type drilling as well as a first-shaped stiffening member is inserted in a first type of the pile, so that adjacent to the first type of pile in the radial direction the partially overlapping, so that the plurality of first type pile at least part of the edge of the tunnel to be formed to construct the first curtain system; (5), by controlling the first bracket and the second support frame synchronizing said The movable body about the longitudinal axis to vary the position of the spray boom construction, repeating steps (1) to (2), in order to obtain a further plurality of first type and a first-type pile bore, such that adjacent to the first type of pile in the radial direction partly overlap crawler rig soft foundation treatment, so that the plurality of first type pile at least part of the edge of the tunnel to be formed to construct the second curtain system walking soft ground treatment of drilling rigs, the first curtain system and the second curtain system combined into a monolithic curtain system [Tianjin-strong high-pressure pump Co., Ltd. to recommend the star product - high-pressure pump] Features: GZB- 40C-pressure injection pump high-pressure jet grouting equipment, mainly to provide high-pressure water spray high-pressure mud spin. For the new building, highway, railway, underground railways and other soft ground reinforcement, anti-seepage treatment for around foundation, cofferdam and hydropower dams.