Development of biodegradable metal implants is a complex problem because it combines engineering and medical requirements for a material. This paper discusses the development of magnesium powder using Metal Injection Moulding (MIM) techniques that can help in the design of biodegradable metallic implants. One of the most important factors in the process of biodegradable implants is to study the powder characterization, mixing behaviour and rheological properties of the powder/binder mixture, which should be monitored and controlled to address the medical concern of biocompatibility. Particle size analysis, scanning electron micrograph (SEM), thermogavimetric analysis (TGA) and differential scanning calorimeter (DSC) were performed in order to determine the characteristics of magnesium powder and binder components. The feedstock were prepared using powder loading of 0.61, 0.63, 0.65 and 0.67 with binder formulations of 50% PW-30% PP-10% SA-10%. The flow properties were measured using a capillary rheometer in the shear rate range expected to occur during metal injection molding.