Recently Polymer/natural fiber composites have earning major consideration due to the big development in non-renewable materials. Many studies were carried out to obtain new composite materials. This review will give significant information about polymer composite materials reinforced with natural fiber especially date palm fiber (DPF). Different machining processes can be applied to the polymer/DPF composite materials conventional or non-conventional machining process. Conventional machining processes like drilling, milling and grinding can be used to create the final shape of polymer/DPF composites. Non-conventional machining processes such as laser beams and water jets are very useful processes when they are used to modify the shape and size of the polymer/DPF composites. Developing the machinability of the natural fiber/polymer composites increased the ability to use these composites in several engineering applications. Moreover, this review illustrates the potential applications of polymer/date palm fiber (DPF) composites because DPF is eco-friendly, lightweight, obtainable in nature, has good sound and thermal insulation and is not expensive material. The applications of polymer/DPF composites include fabrication of the tunnels for air conditioning applications, using polymer/DPF composites in building applications, manufacturing automotive parts like dashboard panels, and using them in the fabrication of the home furniture industry.