Thermoplastic continuous fiber reinforced unidirectional prepreg tape production line mainly consists of eight parts, including fully automatic tension fiber unwinding rack, mechanical yarn unwinding heating mechanism, resin melt quantitative extruder, melt impregnation die head, cooling forming roller, waste edge cutting, winding rack and electrical control system. It is used for the preparation of thermoplastic prepreg tape. After the fiber drawn out by the yarn unwinding system contacts with the high-temperature thermoplastic resin extruded from the impregnation die head device, it is subjected to heating impregnation, pressurization, cooling, slitting, winding and other process processes to make the fiber and resin compound into a thermoplastic prepreg unidirectional tape with a certain thickness and smooth surface.