The application discloses a layered roadbed segmented inclined grouting construction device and method, which comprises a moving mechanism, the moving mechanism comprising a driving vehicle, a
hydraulic cylinder and a
grout tank being fixedly installed on the driving vehicle, and a connecting rod
assembly being arranged at an output end of the
hydraulic cylinder; a grouting mechanism, the grouting mechanism comprising a sleeve, the sleeve being fixedly connected with the connecting rod
assembly, a grouting outer
pipe being slidably connected in the sleeve, a grouting inner
pipe being fixedly connected in the grouting outer
pipe, the grouting inner pipe being communicated with the
grout tank, a plurality of first one-way liquid outlet assemblies being arranged on the grouting outer pipe, a plurality of groups of second one-way liquid outlet assemblies being arranged on the grouting inner pipe, and a segmented guide
assembly being slidably connected in the grouting outer pipe through a first transmission assembly, the segmented guide assembly being located between the grouting inner pipe and the grouting outer pipe. The application can respectively
grout different depth layered roadbeds from the side of the roadbed, avoid damage to the
road surface structure caused by drilling, reduce the number of grouting holes, and do not affect traffic.