The invention discloses a novel steel billet temperature heat preservation device. The device comprises a discharging roller bed and a steel billet removing device; a heat preservation device is arranged on the discharging roller bed before a rolling mill; a cover lifting device is further arranged on the heat preservation device; the heat preservation device is a heat preservation protective cover and is formed by sequentially surrounding a first heat preservation plate to a third heat preservation plate; the third heat preservation plate is vertically arranged on a discharging roller bed rack; the cover lifting device is composed of a telescopic air cylinder, an upper lifting lug, a lower lifting lug and a support; the upper lifting lug is connected with a piston rod of the telescopic air cylinder; the upper lifting lug is arranged at the end, close to the first heat preservation plate, of the second heat preservation plate; the lower lifting lug is arranged at the lower part of theouter side of the first heat preservation plate; the support is fixedly welded on the discharging roller bed rack; and the lower lifting lug is connected with the support through a main shaft. According to the novel steel billet temperature heat preservation device, the heat preservation can be carried out on the rear section of the steel billet, and the original steel billet removing function ismaintained.