The invention discloses an FRP composite micro pile and a manufacturing method and relates to the technical field of engineering pile foundations. The FRP composite micro pile comprises an FRP pipe, an FRP rib and a concrete foundation; a through hole is formed in the FRP pipe; the FRP rib is arranged in the through hole and penetrates the FRP pipe; the FRP rib is connected with the FRP pipe through a positioning ring; the top end of the FRP pipe is connected with the concrete foundation; the FRP pipe is used for being vertically installed in a cavity of a pile hole; and the cavity of the pilehole and the through hole of the FRP pipe are used for casting grouting. According to the FRP composite micro pile and the manufacturing method, an FRP material is used for replacing a traditional rebar or structural steel, and the FRP material and cured cement-based slurry form a pile body; and the FRP material has extremely high corrosion resistant capacity, excellent mechanical performance andgood machinability, the FRP material has similar deformation modulus with the cement-based slurry, the FRP material and the cement-based slurry can achieve collaborative work, the respective performance is given full play to, and the corrosion resistant performance and the bearing performance of the pile foundation are remarkably improved.