With the rapid development of 5G technology, its application prospects in broadcasting and live streaming media transmission is gradually expanding. This paper proposes an optimization scheme based on network slicing and edge computing to address the challenges faced by 5G networks in live streaming media transmission. By constructing an experimental platform, comprehensive performance testing and evaluation were conducted on the proposed scheme. The experimental results show that this scheme significantly improves transmission efficiency, reduces end-to-end latency, enhances video quality, and provides an effective solution for the application of 5G technology in broadcasting and live streaming media transmission.