The ba culov irus o f Penaeus chinensis which is t ransmitted to o f f springs by eggs is the main content of SPF. It is importantment to cut o f f the v irus t ransmissio n and cult ivate the healthier st rain resources of shrimps. Abov e all, its theo ret ica l and pract ical signif icance are unneglected. This r epo rt ma de use o f the elect ro n micro scope techno logy to examine ba culov irus f rom ova ry, egg, Nauplis, Zo ea, My sis of Penaeus chinensi s to Post lar va, Juveniles of Penaeus chinensis . The result s r eveal there is the baculov iruso id in ov ary, egg and baculov irus in Nauplis, Mysis o f Penaeus chinensi s, Post larv a, Juveniles o f Penaeus chinensis. At the same t ime the re po rt pro vides the po ssible discussio n o f the baculov irus vert ical t ra nsmission in Penaeus chinensi s.