Through extensive works conducted on liquid-solid mixing strategies in various industrial applications, many researchers are interested in paying little attention with the use of agitated reactors consisting of ne impeller or multi impellers along with their result on agitation operation. This paper therefore examines the significant variables of solid-liquid mixing with due importance for power inhaled and turbulence. To optimize the transportation yield or output, mixing is to be done which is the combination of solid and liquid phase. In power plants coal is replaced with the slurry prepared by using of coal particles mixed with water for good lubrication to enhance the rheological efficiency and stability. Coal Water Slurry (CWS) preparation and characterization involves coal solid particles in a fluid and particle suspension in an agitation vessel is not more complicated than in slurry pipe flow due to the fact that the average flow in an agitation vessel is not restricted in single direction. Therefore, the current review paper discusses the new methodologies adopted in the preparation of CWS and various parameters involved.