PRP extraction device and extraction method

The invention discloses a PRP extraction device and an extraction method. The PRP extraction device comprises a cylindrical pipe body, a separator, a cover body and a push knob, an inner cavity of the tube body is a blood storage cavity used for storing a blood sample, and the top of the blood storage cavity is closed up to form a liquid inlet; the separator can rotate relative to the tube body, a first storage cavity and a second storage cavity are formed in the separator, and sample channels are formed in the bottom ends of the two storage cavities; a first cover cap and a second cover cap which are correspondingly communicated with the first storage cavity and the second storage cavity respectively are arranged on the cover body, and the first cover cap and the sample channel of the first storage cavity are coaxially arranged; the pushing knob performs circular motion relative to the tube body and is used for adjusting the volume of the blood storage cavity. An injector storing a blood sample enters the fi