This paper describes the potential of existing exhaust emission reduction technologies for diesel engines fuelled with fatty acid methyl esters(FAME), named "Biodiesel". The common-rail high-pressure injection equipment and exhaust gas recirculation(EGR) for the in-cylinder combustion improvement technology, the diesel particulate filter(DPF) and diesel oxidation catalysts(DOC) for the after-treatment technology, and the cetane improver addition for the fuel treatment technology are described based on the experimental results.