The invention provides an extracting method of
viral nucleic acid capable of being used for
high flux full
automation extraction by a
magnetic bead method, which is characterized by comprising the steps of separating viruses via a
magnetic bead I: absorbing the viruses to the
magnetic bead I from a biological sample to obtain the magnetic bead I with the viruses which is called as a
virus-magnetic bead I composite for short, additionally adding a
magnetic field to separate the
virus-magnetic bead I composite from the sample, suspending the
virus-magnetic bead I composite in a
lysis buffer I, dissociating the virus from the magnetic bead I in the
lysis buffer, additionally adding a
magnetic field to remove the magnetic bead I, and heating to crack the virus; and separating a
viral nucleic acid via a magnetic bead II: absorbing the
viral nucleic acid in a viral lysate via the magnetic bead II, additionally adding a
magnetic field to separate the magnetic bead II with the viral
nucleic acid from the viral lysate, washing the magnetic bead II with the viral
nucleic acid by using a washing solution, and eluting the viral
nucleic acid from the magnetic bead II by using a solution to obtain a purified viral nucleic acid. In the invention,
cracking cells and separating viruses are completed at one step in one tube by using the magnetic beads; and extraction of the viruses and the viral nucleic acid can be achieved by using two magnetic beads so that the extraction process is simple and rapid without a complicated device, and high pass automatic operation is easy to be realized.