Aptamer is a kind of functional nucleic acid macromolecules which is made up of single-stranded DNA/RNA molecules that can be bind to a variety of non-nucleic acid target molecules with high specificity and affinity (Ellington and Szostak, 1990; Tuerk and Gold, 1990). Many selective aptamer-based PDGF-BB biosensors had been earlier reported. For example, (Tang et al., 2012) designed a simple colori- metric sandwich sensor for PDGF-BB detection with a low detection limit via dual enzyme processes to significantly amplify the signal, but the procedure was complicated. Wu et al. (2010) developed a new electrochemical aptameric sensing system for the detection of PDGF- BB with high selectivity, but the detection limit is not low enough. Moreover, these methods have only been operated effectively and successfully in the laboratory. They are difficult to monitor online, or use in personal families due to their large scale and expensive equipment. Thus, the development of a more sensitive, low-cost, simple and portable biosensor for PDGF-BB determination is still a challenge.