The utility model discloses an auxiliary pollination writing brush for hybridizing tobaccos, which comprises a brush holder (1), wherein the front end of the brush holder (1) is provided with pollination brush bristles (2), the length (L) of the pollination brush bristles (2) is 0.15 to 0.25cm, and the width or diameter (D) of the end heads of the brush bristles of the brush holder (1) is 0.2 to 0.3cm. In the auxiliary pollination writing brush for hybridizing the tobaccos, the pollination brush bristles are manufactured by reducing the length and the number of the brush bristles. By the pollination brush bristles, the wastage of pollen can be effectively reduced, the utilization rate of the pollen of the tobaccos is enhanced, the manpower and the material resources for collecting the pollen are saved, the planting area of the male parents of the tobaccos is reduced, and the production cost of the hybrids of the tobaccos is lowered. The auxiliary pollination writing brush disclosed by the utility model has favorable economic and social benefits. The auxiliary pollination writing brush disclosed by the utility model has a simple structure, a low manufacturing cost and a good use effect.