The invention belongs to the technical field of bioengineering and discloses a convenient method for extracting oospores of Peronophythora litchi from a solid culture medium. The convenient method includes covering a nylon film on the surface of the solid culture medium, inoculating the Peronophythora litchi on the surface of the nylon film, and tearing the film after culture according to a conventional method so as to obtain the oospores of the Peronophythora litchi from the solid culture medium. The convenient method for extracting the oospores of the Peronophythora litchi from the solid culture medium has the advantages that the nylon film is covered on the surface of the solid culture medium, then the Peronophythora litchi is inoculated for culture, hyphae grow on the surface of the nylon film basically, a small quantity of hyphae grow on the surface of the culture medium by penetrating through the film, colonies on the surface of the culture medium grow well and contain a great number of oospores, and separation of the hyphae from the oospores of the Peronophythora litchi is achieved basically through tearing the film, so that a great number of pure oospores of the Peronophythora litchi are obtained from the solid culture medium. The convenient method for extracting the oospores of the Peronophythora litchi is capable of obtaining a great number of pure vital oospores, so that the possibility of developing oospore research is increased greatly.