Abstract：In order to meet the development needs of beef cattle industry in Jilin province, facing the
problems such as low breeding efficiency, poor technical application effect and lack of talents in the
process of expanding and propagating beef cattle improved varieties, focusing on the production and
application of beef cattle breeding technology, we summarized the key points of improved breed ex?
pansion and propagation technology, and sorted out the operation rules of reproduction technology
such as early breed selection, estrus identification, superovulation, artificial insemination, ovum pickup, embryo transfer, etc., so as to provide theoretical basis for the standardized application of technology and the improvement of effect. We integrated and applied the existing breeding technology,
strengthened the breeding management, fully tapped the breeding potential of fine breeding animals,
and created a modern beef cattle breeding industry to provide favorable conditions.
