The invention discloses a rotating drum and filter cloth fixing structure of a vertical centrifugal machine. The rotating drum and filter cloth fixing structure comprises a rotating drum backboard; the edge of the inner side wall of the rotating drum backboard is hollowed towards a rotating drum backboard body for forming an annular groove; bulged annular plates are arranged on the inner side wall of the annular groove outwards in parallel and in a spaced manner; a bracing hoop is embedded into the annular groove; the side, located at the interior of the annular groove, of the bracing hoop is hollowed to form a groove; the bulged annular plates are fitted with the groove; a triangular annular kerf, towards the interior of the bracing hoop, is formed in the upper side surface of the bracing hoop, and is connected with the opposite side of the groove; and filter cloth is clamped between the annular groove and the bracing hoop. According to the rotating drum and filter cloth fixing structure of the vertical centrifugal machine, through the improvement on the structure of the traditional bracing hoop for the fixing between a rotating drum and the filter cloth, the filter cloth is clamped in a tortuous fitting manner, so that the contact area between the bracing hoop and the filter cloth is increased substantially, the slipping resistance of the filter cloth is increased, and the filter cloth and the bracing hoop are prevented from slipping and falling respectively.