Influenza A is a rapid-changing disease that causes 5,000,000 deaths annually worldwide. Challenges of disease control in the modern world with high population mobility remains at the speed and accuracy of diagnosis. However, nowadays influenza A subtyping method rely greatly on RT-PCR, which requires a long time, expertise and laboratory space. Meanwhile, a novel type of riboswitch, namely Toehold Switch, shows its potential in subtyping Influenza A with quicker detection and lower production cost.