This assay kit releases DNA from tissue sections by using a special deparaffinization method and lysing conditions to minimize the damage to DNA resulted from formaldehyde crosslinking. Moreover, a centrifugal adsorption column that can specifically bind to DNA and a unique buffer system are used for FFPE DNA extraction. The whole process is simple and fast, and the extracted genome has good integrity, high purity, and stable and reliable quality. It is suitable for clinical testing and scientific research.