The invention relates to the technical field of engineering construction, in particular to an automatic pressure feeding device and method for lubricating and drag-reduction slurry for push pipes. The device comprises a push bench, pipe units, a control cable, a slurry feeding main pipe, slurry feeding branch pipes, valve stations, a central control box and a pump station, wherein the pipe units are arranged behind the push bench; slurry feeding pipes are arranged in the pipe units and comprises one slurry feeding main pipe and a plurality of slurry feeding branch pipes; a plurality of valve stations are arranged on the slurry feeding main pipe, each valve station comprises a slurry feeding main pipe, slurry feeding branch pipes, slurry feeding branch valves, a slurry feeding master valve and a remote control box which is connected with the slurry feeding master valve and the slurry feeding branch valves through signal wires. Compared with the prior art, the device has the advantages that remote central control, the central control box and the control cable are adopted to directly control the slurry feeding process, so as to avoid various disadvantages caused by manual operation, improve the construction efficiency, accelerate operation response, reduce labor intensity and improve lubricating effect of fed slurry, and as a result, the slurry feeding amount is stable and the slurry feeding process is efficient.