《黑鞑事略》、《卢布鲁克行纪》等史料记载耶律楚材、镇海被称为中书相公、中书右丞相、中书领省,其实,他们的主要身份即为必阁赤。他们的后代还形成一些著名世袭必阁赤的家族。国内外关于必阁赤的研究不少,本文主要对日本学者宫崎市定、坂本勉、片山共夫关于必阁赤的研究进行述评,并结合自己的初步研究,提出一些进一步探讨的想法。文章第一部分讨论日本学者对必阁赤的研究,结合讨论更早的唐长儒、李涵、札奇斯钦,较近的萧启庆等学者的研究成果,作为讨论日本学者成果的背景,说明日本学者的进步和不足。第二部分主要列举以往学者未讨论过的必阇赤,蒙哥汗时期的张庭珍、刘世济、王堮等家族的情况。最后一部分主要讨论了衙门必阁赤与“掾史”的对应关系,以及以往学者讨论过的怯薛必阁赤的使者与山川祭祀的职能。 “Black Tato”, “Lu Buluke” and other historical records Yale Chu material, Zhenhai is known as Zhongsugongshu, Zhongshu right prime minister, Shuzhonglian, in fact, their main identity is to defeat. Their descendants also formed a family of well-known hereditary beings. There are a lot of domestic and foreign researches on Bixiku. This paper mainly reviews the research of Japanese scholar Miyazaki Shimizu, Sakamoto Matsumoto and Katayama Katsuhiko about Bomi Akatsuki, and puts forward some ideas for further discussion according to their preliminary research. The first part of the article discusses the Japanese scholars’ study on Bectochi and the research results of earlier scholars such as Tang Chang-ru, Li Han, Zachischin, and Xiao Qi- Progress and deficiencies. The second part mainly lists the families that have not been discussed by the former scholars, such as Zhang Tingzhen, Liu Shiji and Wang Jue in the period of Meng Ghan. The last part mainly discusses the correspondence between Yamen Bungeegong and “Histories ”, as well as the messengers and mountains sacrificial functions discussed by scholars in the past.