A beamed scan technology is proposed for small IFOV of a missile seeker. Three typical scan graphics of S figure, Z figure and line-by-line helix scan are researched in a contrast way. Based on the synthetic analysis of scan period and detection probability, line-by-line helix scan is chosen as the beamed scan mode. A mathematical model of angle-scheduled loop is established and a dual-module fuzzy PID controller is designed. The angle-scheduled loop is simulated to effectively control the seeker. A mathematic model of dual-model controller of Fuzzy-PID is established. Finally, when target-indicating angle is at 1°, system simulation is conducted with step input. The results show that the dual-module fuzzy PID controller has the advantage of small over shoot, high static accuracy and short response time, which meet the requirements of the system and realize beamed scan control.