In order to facilitate the molecular characterization of the Herpes simplex Virus types 1 and types 2 genome DNAs, a gene library of cloned restriction frtgments have been produced. The Vero cells were infected with HSV-1 and HSV-2. 48 hours after infection, the infected cells Ivere Iysed, and multinucleated giant cells were observed approximately at seventy-two hours postinfection. The multiplication of HSV-1 and HSV-2 was observed in Vero cells using electromicroscopy. The nucleocapsids in nuclei were obseryed, and the assembled virions were budded out through the vacuole, and the virions were released from the cells. HSV-1 and HSV-2 was analyzed by digestion of their genome DANs with restriction ensymes. HSV-1 and HSV-2 genome DNAs were digested with BarnHI, Bgfl respectively. The BarnHI rlestriction fragments of HSV-1 and HSV-2 genome DNAs were twenty-seven fragments and thair molecular sizes were ranging $0.70{sim}15.08$, $4.4{sim}31.0$ tilobases. The BglII restriction fragments of HSV-1 and HSV-2 genome DNAs were sixteen, eighteen fragments and thair molecular sizes were ranging $4.8{sim}30.0$, $1.2{sim}25.0$ kilobases. And then BglII restriction frgments were cloned in Escherichia coli(E.coil) using the plasmid vector pBacPAK9.