专家证人因其具备的知识、技能、经验等专门知识,能够帮助法官与陪审团认定案件事实及帮助法官解释普通人难以理解的复杂的专业性问题,已经成为现代诉讼中一个不可或缺的组成部分。反垄断诉讼中合格的专家证词要满足主体、客体、检材等程序要件,并通过相关性和可靠性标准来检测其证明能力和证明力。专家证词是可以被排除的,在某些情况下也应该被排除。当专家在提供证词过程中,侵犯了他人的隐私权、商业秘密或者没有履行好其法定义务时,受损害方可以要求其赔偿。 Expert witnesses, with their specialized knowledge of knowledge, skills and experience, can help judges and juries to ascertain the facts of the case and to help judges interpret complex professional issues that ordinary people find difficult to understand have become an indispensable component of modern litigation section. Qualified expert testimony in antitrust litigation should satisfy the procedural requirements such as subject, object, material inspection and so on, and test its proof ability and proof power through the standards of relevance and reliability. Expert testimony can be ruled out and in some cases should be ruled out. When the expert testifies in the process of infringing the privacy of others, trade secrets or failed to fulfill its statutory obligations, the injured party can claim compensation.