The work aims to summarize the recent progresses on plant fiber reinforced polylactic acid foaming materials so as to provide a reference for the preparation and performance research of polylactic acid foaming materials. The classification was carried out according to the foaming method and the properties of plant fiber/PLA composite foam materials prepared by different foaming methods were introduced. The effects of plant fiber added to supercritical CO2 foaming method on the properties of foaming materials were mainly reviewed. The research of PLA foaming material reinforced by plant fiber was in the stage of laboratory research. The cell size of PLA foaming material added with plant fiber was more uniform and smaller, and the density increased. The mechanical properties were also improved. The mechanical and other properties of PLA foaming materials can be enhanced by adding plant fiber. The research on plant fiber and PLA composite foaming materials is of great significance for large-scale production of PLA foaming materials.