In wireless networkon chip, congestion around wireless node and load balance in subnet and global network play an important role in communication efficiency. In this paper wepropose a global traffic balance mechanism(GTB) basedon Edgefirst algorithm. Firstly, we optimize wired/wireless data packet partition method to mitigate congestion around wire lessnode. Then we propose Edgefirst routing algorithm to balance load inside subnet according to wireless node running conditions. In the end,a global subnet congestion a wareness (GSCA) judge mechanism is proposed to endow long distance data packet with higher priority to transit through subnet with low congestion level, which balances traffic loading lobalnet work. Evaluationresults show that this mechanism guarantees low latency and high through out, significantly improves network load balance ability with acceptable hardware and power consumption.