Robbery is always a threat toward keeping stability of political power and sustaining of public security. In the early stage of Sung, laws regards to rubbery are legislated in "Sung Xing Tong". After Zen, a severe law was set to strictly control on robbery. Forty years later, severe law of robbery suspended, but robbery was still rampant. This article is subjected to discuss on severe law of robbery legislation and annulment history, execution of law, court adjudication as well as difference in North Sung and South Sung. In another view to compare penalty between North and South Sung, South Sung is more strict with punishment but slack off in execution.