中文摘要：

随着厦门翔安海底隧道和青岛胶州湾海底隧道相继开工，我国海底隧道工程建设进入起步阶段，如何防治海底隧道工程对海洋环境的污染已经成为亟待解决的课题。海底隧道工程通过地质勘探、事故、工程排污等途径引起海洋生态环境污染，其污染既具有其他海洋工程污染海洋环境所具有的兼具开发性与破坏性；持续性强；扩散范围广；防治难、危害大的共同特点，也具有危害有一定潜在性与不可预期性、工程污染需要严格的科学技术规范和监测的自身特点。针对目前我国现有法律制度对海洋工程界定的不准确以及环境影响评价制度和排污收费制度中存在的不足，本文给出了相应的完善措施。

英文摘要：

As Xiangan Cross Harbour Tunnel in Xiamen City and Jiaozhou Bay Cross Harbour Tunnel in Qingdao City have been initiated successfully, the construction of China＇s cross harbour tunnels has entered into an initial stage. Therefore, how to prevent cross harbour tunnel project from polluting marine environment has become an urgent problem. Cross harbour tunnel can pollute marine ecological environment through geological exploration, accident and waste disposal characterized by sustainability, wide spread, difficult prevention and great harm to marine. Besides, its harm can be characterized by potentiality and unpredictability, rigid scientific and technological regulations needed by project pollution and monitoring. Due to inaccuracy for present laws in China in defining marine project as well as deficiency in environment impact assessment system and charging system for pollutants emission, this paper has proposed correspondent measures for perfection.