Abstract: By using PB-20 pellet burner as experimental device, and the 8 mm diameter straw pellets as experimental materials, the paper was focused on the effect of ignition wire power, air supply speed and feeding quantity on the hot-air ignition. The test results showed that the experiment system could reach the best effect under the condition that the ignition wire power was 394 W, the air supply speed was 2.5 m/s and the feed-in was 300 g. The average ignition time was 197 s, and the accumulated air pollutant emissions were 3 133 mg CO, 73 mg NOx and 27.7 mg SO2. The results can provide a theoretical foundation for the design of automatic control system for pellet burner.