法学家的任何法律参与行为在为法治贡献正推力的同时,也不可避免会产生反推。专家法律意见书进入法庭,法不禁止,但并不合理。分析专家法律意见书的催生原因可归纳为以下几点:当事人寻求专业支撑但也在制造关系;法学家秉持公义精神但也受私利驱动;法官则或有惰怠与推卸责任之意。专家法律意见书可能会扭曲学术品格,异化诉讼程序,扩大裁判法源。 While any jurist ’s legal participation contributes positively to the rule of law, it will inevitably produce backtracking. Expert legal opinion into court, the law is not prohibited, but it is not reasonable. The reasons for the analysis of the legal opinions of experts can be summarized as follows: the parties seek professional support but are also making relations; the jurists uphold the spirit of righteousness but are also driven by private interests; and the judges are either lazy or shirking their responsibilities. Legal opinions of experts may distort academic character, alienate legal proceedings and expand sources of magistrates’ law.