Abstract: Providing animal welfare is the basic guarantee for the harmonious coexistence of humans and animals，which is also a key factor in promoting the transformation and upgrade of domestic animal husbandry. At present，China has not yet established regulations related to welfare of animal husbandry，and there is a relative lack of input on welfare factors in pig breeding. At the same time，sow reproductive performance as a measure of production ability，their performance is directly related to the benefit of the farm. Therefore，based on the sow welfare optimization as a perspective，this paper firstly combed the development process of animal welfare. Then it focuses on the welfare factors and existing problems affecting sow reproductive performance，and gave corresponding improvement measures from three aspects including living environment，nutrition and personnel operation management. Finally this paper provided welfare advice for improving sow reproductive performance.