The present invention belongs to the field of retorting apparatus used in the field of oil shale processing, in particular the invention relates to the end sealing assembly of the rotary kiln and the improvements of the end sealing (16); whereas the first and second casing ring (2, 3) used in the end sealing compose of at least four segment, and onto both sides of the rotating casing ring (1) a rectangulary cut hollow (81, 91) for lubricants has been formed; and on the side that is assembled with the rotating casing ring of the first and second casing ring (2, 3), accordingly, a hollow (82, 93) has been formed for lubricants, which in the making face the corresponding hollow (81, 91) of the casing ring, forming lubricant channels (8, 9) between the casing ring (1) of the end sealing assembly and the first and second casing ring (2, 3).