This was reported by the Ziyu Shibao newspaper.
In particular, covers were removed from double-barreled ground-to-air artillery mounts, which are installed near the runway.
Radar systems were also brought to a state of readiness, TASS reports.
Earlier, local media, citing the police, reported that Pelosi's special flight would arrive at the airport in the Taiwanese capital of Taipei.
Chinese Foreign Ministry spokeswoman Hua Chunying said that China will take strong measures to protect national sovereignty and territorial integrity if Pelosi visits Taiwan.