Design of the machining, angle conversion, aiming control is difficult because tracking system in tracking guide simulation training is complex. For solving this problem, design a shooter tracking and aiming system based on rotary encoder and programming gate array chip. Analyze system composition, rotary encoder angle conversion and design principle, then put forward simulation result. The real application result show, the system can realize shooter tracking angle information output and aiming “cross line” motive control. The system has the characteristics of simple structure, low cost, convenient operation and is important on raising the shooter operation level.