Abstract:The "spatial agglomeration" effect of the ultra-large and large cities brings the huge pressure to the urban traffic system. The rapid upgrading of urban road is an effective solution. The urban development stage and urban road network form of Fuzhou are very typical. The rapid methods of the trunk road network in Fuzou are studied. The construction development situation of the trunk road network in Fuzhou is analyzed. Combined with the site survey and traffic big-data analysis, a rapid upgrading scheme of road network system is put forward. And the efficiency of the overall scheme is analyzed from adding 2.5 rings, north expanding Ring III, speeding up Gongye Road - Guohuo Road and the other aspects.