The invention discloses a slope support structure and a support method. The left side of a bottom plate is fixedly connected with a sleeve. The sleeve penetrates through the bottom plate. A drill rodis sleeved in the sleeve. Limiting convex strips are symmetrically arranged on the two sides of the drill rod. Grooves are symmetrically arranged on the two sides of the inner ring of the sleeve. Thelimiting convex strips are embedded in the grooves of the inner ring of the sleeve. The lower portion of the drill rod is pointed. The upper end of the drill rod is fixedly connected with a top disc.A limiting hole is formed in the upper surface of the right side of the top disc. A rotating shaft is arranged on the right side of the sleeve. The lower end of the rotating shaft is in bearing rotaryconnection with the upper surface of the bottom plate, and the upper end of the rotary shaft is fixedly connected with a press plate. The press plate is eccentrically arranged at the upper end of therotating shaft. A through hole is formed in the middle of the press plate, and a pin shaft is connected in the through hole in an inserted manner. By means of the support structure, a triangle has stability, a lead screw is driven to rotate by rotating an adjusting wheel, the lead screw drives a threaded barrel to move, then a telescopic plate is driven to stretch out and draw back along a fixedplate to adjust the inclination angle while moving, and slopes of different angles can be supported.