This book constitutes the proceedings of the Second China Conference on Networking, CCF ChinaNet 2025, which took place in Shenyang, China, during September 12-14, 2025. The 13 full papers included in the book were carefully reviewed and selected from 102 submissions. They deal with networking technologies such as cloud computing; mobile and network security; computer engineering and networks; etc. The theme of this year's conference was “Integrating Industry, Search, and Innovation, Serving the Networking Powerhouse”.