The utility model discloses a reaction frame device for a fiber reinforce plastic (FRP) rib pull-out test. The reaction frame device for the FRP rib pull-out test comprises an upper steel plate, a lower steel plate and a vertical ribbed steel plate, wherein a plurality of reinforcing steel pull rods are fixedly connected between the upper and the lower steel plates, and the vertical ribbed steel plate is fixedly connected in the center position of the bottom surface of the lower steel plate. A gap is arranged on the upper steel plate, and consists of a rectangle gap segment and an arc-shaped gap segment, the arc-shaped gap segment is arranged on the center position of the upper steel plate, the rectangle gap segment and the arc-shaped gap segment are communicated, and the rectangle gap segment runs through the edge of the upper steel plate. The reaction frame device for the FRP rib pull-out test completes an indoor pull-out test by utilizing an electro-hydraulic servo universal testing machine, achieves to control the overall process of the indoor pull-out test through a computer, meets the diversity demands of the indoor pull-out test, and is simple and reasonable in structure design.