The utility model relates to a tail cable protection device which comprises a cylindrical body. The cylindrical body is formed by jointing two halves. The joint faces of two halves are respectively provided with strip groove which axially extends along the cylindrical body, wherein the section of each strip groove is semicircular. Both ends of each strip groove respectively run through two end faces of the cylindrical body. Two strip grooves are jointed to form a through hole which axially runs through the cylindrical body. The outer cylindrical faces of two end parts of the cylindrical body are respectively provided with a circular groove which is used for accommodating a ribbon. An outer thread is arranged on the outer cylindrical face of one end of the cylindrical body. The protection device further comprises a cylinder body which sleeves the cylindrical body through the outer thread. The other end of the cylinder body is sealed and is connected with a dragging mechanism. According to the utility model, a tail cable can be effectively prevented from pollution or damage, and the tail cable protection device is convenient for tail cable dragging construction.