Due to the alarming rise in environmental regulations and ecological threats, research on natural fiber-based biodegradable polymer composites has burgeoned. One such polymer which has received a plethora of attention in recent years is Poly-Lactic Acid (PLA). Natural fibers possess distinct physical, chemical, and mechanical properties. In addition, it is recyclable, less expensive, and easily available. However, natural fibers have some drawbacks like moisture absorption, subsequent swelling, poor chemical resistance, and poor interfacial interactions with polymer matrices. These shortcomings can be overcome through surface modification techniques which include the usage of plasma technology and chemical agents such as sodium chloride, silane, stearic acid, etc. This paper presents a review of the mechanical properties of PLA based natural fiber composites. This review also demonstrates the influence of fiber surface treatment and manufacturing methods on the properties of PLA composites.