The system parameters may have great changes in the process of the automatic shell magazine position control according to the number change of shells in the shell magazine. Some disturbance factors also exist at the same time, such as meshing impact, nonlinear friction, etc. An adaptive fuzzy sliding mode control scheme was proposed for solving above problems. The adaptive algorithm was adopted to estimate the system parameters and the influence of the system parameters changes was reduced. And then used a fuzzy logic system in the traditional sliding mode control instead of discontinuous switching control term, and the chattering in the control effort was reduced. The simulation results show that the control scheme is insensitive to parameters variations and external disturbance, and has high control precision.