The invention discloses a writing brush with a support. The writing brush comprises an upper brush holder, a lower brush holder, a brush head and brush hair. The writing brush with the support is mainly characterized in that a trapezoid groove and a square groove communicating with the trapezoid groove are formed in the right end of the upper portion of the lower brush holder in the axial direction; a front round through hole and a rear round through hole which are symmetrical, and a front round concave hole and a rear round concave hole which communicate with each other are formed in the front wall-thickness portion and the rear wall-thickness portion of the lower portion of the square groove correspondingly; the support which is composed of a front elastic steel piece and a rear elastic steel piece which are symmetrical is disposed in the square groove; a front supporting foot and a rear supporting foot are disposed at the right ends of the upper portions of both the front elastic steel piece and the rear elastic steel piece correspondingly; the bottom end of a front support head portion and the bottom end of a rear support head portion are designed as half-cylinders, small round through holes are formed in the front support head portion and the rear support head portion in the thickness direction, and the front support head portion and the rear support head portion are movably fixed in the square groove through a rivet; and a movable ring capable of moving up and down is arranged at the outer diameter end of the lower brush holder and above the trapezoid groove in a sleeving mode. By means of the writing brush with the support, an extra brush rack does not need to be arranged, and the writing brush with the support is quite convenient to use.