The invention discloses an effort-saving fire-fighting lance comprising a lance body (1) and a lance head (2), wherein the lance body (1) is detachably connected with the lance head (2); the front end of the lance body (1) is provided with a fastening belt (3) and a buckle (4); one end of the fastening belt (3) is fixed on the lance body (1), and the other end of the fastening belt (3) passes through the buckle (4) and is tightened and fixed through the buckle (4). The fire-fighting lance not only has an effort-saving effect, but also is suitable for people with hands with different sizes, thus having a wide application range.