The invention provides a portable right-angle base safety fence, and relates to the technical field of safety tools. The portable right-angle base safety fence comprises a right-angle support frame and a take-up mechanism. The right-angle support frame comprises a vertical right-angle plate, a horizontal right-angle plate and an inclined support plate. The vertical right-angle plate and the horizontal right-angle plate are rotationally connected through a rotating shaft. One end of the inclined supporting plate is rotationally connected with the horizontal right-angle plate, and the other endof the inclined supporting plate is clamped to the vertical right-angle plate. The rotating shaft is connected with the inclined supporting plate through a spring. The take-up mechanism comprises a cylindrical shell and an enclosing edge. An enclosing edge storage support is arranged in the shell. One end of the enclosing edge is wound around the enclosing edge storage support, and the other end of the enclosing edge penetrates through the shell and is fixedly connected with the right-angle supporting frame through a fixing piece. The portable right-angle base safety fence adopts a right-anglesafety fence base. The right-angle base is light in weight and good in stability, the carrying weight can be reduced, the carrying time can be shortened, the workload is reduced, and the working efficiency of the operation and maintenance personnel is improved.