In the light of the current movement of Chinese fishery in the Beibu Gulf, the paper deals with the impacts on implementing the Sino-Viernamese Fishery Agreement in the Beibu Gulf. It's estimated that a loss of RMB 99.3 billion yuan would be suffered in that numerous fishing boats in the region of the South Ghina Sea would withdraw from the west gulf after the demarcation, Meanwhile, the fact that it' s difficult for the fishermen to transfer themselves to other types of work would render the fisheries resources in Chinese inshore waters suffer more fishing pressure and have an influence on the management of the system of the time and area closures for the mechanized fishing boat. In addition, the fishermen have difficulty in mastering the position of the demarcation line in the Beibu Gulf. Because some suggestions are put forward in the light of the situation. Firstly, an effort should be made for a nationwide comprehension on the conservation of fishery resources. Secondly, the fishing efforts should be reduce and the fisheries structures be further adjusted. Thirdly, investigation of the fishery resources should be strengthened. Finally, an independent executive agency is anticipated to be established to study the potential problems and countermeasures.