The invention relates to the field of calcium carbide production equipment, and discloses a calcium carbide furnace mouth and a calcium carbide furnace, which solve the problems that an existing furnace mouth is complicated in installation, easy to loose, and short in service life. The calcium carbide furnace mouth comprises a furnace mouth body and an installation base, wherein a chute is arranged in the front surface of the furnace mouth body; a limiting baffle plate and a fixing baffle plate are arranged on the back surface of the furnace mouth body; the installation base comprises a base body, a cross plate and a vertical plate; a limiting bulge fit and adaptive to the limiting baffle plate is arranged on the upper side of the cross plate; and a fixing vertical plate connected and adaptive to the fixing baffle plate is arranged on the lower side of the base body. Through fitting and adapting of the limiting baffle plate and the limiting bulge, the furnace mouth body is prevented from sliding down; the installation base is connected with a furnace body through bolts, so that the installation strength is improved; the fixing baffle plate and the fixing vertical plate are in boltconnection, so that the connecting strength of the furnace mouth body and the installation base is improved, and meanwhile, installation and replacement can be carried out conveniently; and the size of the installation base is smaller than the size of the furnace mouth, so that the installation base is effectively prevented from being damaged by fire, and the service life is prolonged.