Abstract: The 3 m × 2 m Icing Wind Tunnel, a key national scientific and technological facility of Chinese "Eleventh Five -Year Plan", is the largest non-seasonal icing wind tunnel in the world. Since its establishment in 2013, the facility has completed more than 70 tests, which strongly supports the domestic aircraft's independent development and airworthiness certification. The composition and characteristics of the 3 m × 2 m icing wind tunnel are first introduced. Secondly, several new progress in improving wind tunnel test capabilities and developing of test technology from 2020 to 2022 are mainly summarized. Through the development of dual closed-loop adaptive temperature control technology, dual-channel hot-air supply anti-icing test technology, ice shape real-time measurement technology, engine intake accurate simulation technology, rotor icing-aerodynamic load synchronization test technology, etc., simulation capabilities, hot gas anti-icing test capability, ice shape measurement capability, air intake simulation capability, and helicopter rotor icing test capability have been enhanced, and the overall test efficiency has been significantly improved. Finally, the challenges of the large-scale icing wind tunnel tests and the development of the test technology for large supercooled water drops are prospected.