Abstract: Heilongjiang Province is one of the main onion producing areas, and its onion market time is staggered with other producing areas, effectively filling the gap in market supply. In order to promote the sustainable development of onion industry in Heilongjiang Province and improve the overall quality of onion, this paper summarized and introduced the key technical links in the onion cultivation process according to the growth habit characteristics of onion. Introduced the technical points of onion variety selection, seedling rearing technology, planting method, field management, disease control, pest control and harvest process.