Along with the saveral application in research and clinical medicine as well as sevral other sciences,Solid Lipid Nanoparticles are rapidly growing field of recent nanotechnology.Solid Lipid Nano particles is very promising technique for site specific drug delivery systems.Solid Lipid Nanoparticles provides the possibility of developing new therapeutics.There is several type of nanocarriers like Solid Lipid Nanoparticles,lipid drug conjugates and nano structured lipid carriers.Several types of analytical or evaluation techniques and preparation methods are described.Along with these the advantages and disadvantages of Solid Lipid Nanoparticles were discussed. If properly focused on the Solid Lipid Nano Particles it is promissing techniques to overcome the limitations of conventional drug delivery systems.