The utility model provides a tobacco planting sign board support which comprises a tripod which is arranged at the bottom of the tobacco planting sign board support, a first extensible rod, a second extensible rod and a third extensible rod, wherein the first extensible rod, the second extensible rod and the third extensible rod are sequentially connected with the tripod in a sleeved mode, a fixing plate which is used for fixing a sign board is installed on the top of the third extensible rod, and the lengths of the first extensible rod, the second extensible rod and the third extensible rod are from 40 centimeters to 60 centimeters. The tobacco planting sign board support has the advantages of being reasonable in design, simple in structure, easy to implement, convenient to use and capable of solving the problem of fixing the tobacco sign board in a field, greatly improving displaying effect of the sign board, reducing breakage rate of the sign board, relieving labor intensity of tobacco scientific research staff and reducing scientific research cost.