[en] Since 1990s Vietnam is undergoing rapid industrialization with the national goal of becoming an industrial country. As a result, large tracts of agricultural land were conversed to industrial zones and clusters. This paper analyzes the complex impacts caused by industrialization on household food security. Both qualitative and quantitative methods were applied to investigate how land conversion process to industrial companies affected food security of different groups of peasant households in Hung Yen province, the most rapid industrialization province in Red River Delta of Vietnam. The study showed that industrialization and neo-liberalism affected household food security in three aspects: the lost of large agricultural land area which did not ensure stable jobs for peasants; the decline of living quality as a result of environmental pollution and high living costs; and the lost of household self reliance on food, with 77 percent of surveyed households not producing enough food for their own consumption. Industrialization had created a new class structure in the Vietnamese countryside with the rise of landless peasants who survived by selling their labor and who are net food buyers. The study contributes to the research that link the analysis of household food security with livelihood systems in the processes interacting across scales, from the very local to the global.