Aptamer is a kind of functional nucleic acid macromolecules which is made up of single-stranded DNA or RNA molecules that can be bind to a variety of non-nucleic acid target molecules with high specificity and affinity. Aptamers can be used for both basic research and clinical purposes as macromolecular drugs and can be combined with ribozymes to self-cleave in the presence of their target molecule. These compound molecules have additional research, industrial and clinical applications.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.