刑事技术人员因其同时兼有侦查人员和鉴定人的双重身份和职责,其出庭作证除具有跟侦查人员和鉴定人相同的实体和程序价值外,还因其证人身份的双重性,对保证司法公正的意义更大。实证调查显示,目前刑事科学技术人员出庭作证存在问题和困境,应当限定刑事科学技术人员出庭作证的范围和方式,并做好相应准备工作。 Because of their dual identities and responsibilities of both investigators and appraisers, criminal technicians, in addition to having the same substantive and procedural value as investigators and appraisers, also have the right to ensure judicial fairness due to the dual nature of their witnesses More meaningful. The empirical investigation shows that at present the criminal science and technology personnel present the problems and difficulties in court testimony, and the scope and ways of the criminal science and technology personnel to testify in court should be limited and corresponding preparatory work should be done.