The present paper makes a chronological restudy of the controversial Han period cultural remains, and dates the Tianzhuangtuo remains to the early Eastern Han, the College of Physical Culture remains to the late Western Han, and the Wanjia Matou, Second Wuben Village, Xinanfeng,Liguanzhuang, Beixinzhuang and Beiwangman remains to the Eastern Han. On this basis the author comes to the following conclusions : Up to the present, more than 100 spots of Western Han, Eastern Han and Han Wei remains have been discovered on the western shore of the Bohai Bay; the previously-called chronological gap of ancient remains does not exist on the western shore of the Bohai Bay; the so-called“transgressions of the late Western Han period on the western shore of the Bohai Bay” must have been sea level changes which happened only in a few areas, in short periods and on a small scale of going up and down, and so should not taken as transgressions; and no transgressions happened in the late Western Ran.