A-1 catalyst is mainly used for flexible polyether polyurethane foam production can also be used for packaging foam. A-1 catalytic effect on the water particularly strong, it can reduce the foam density. It is used to control the effectiveness of the response of gas produced about 80% gel used to control the efficacy of about 20% reaction. The catalyst activity, with less, adjust the amount of the series, can control the rising foam and gel time. A-1 and the share of organic tin catalyst, foam production can significantly increase tolerance, to ensure operation in production would not be careless or measuring system, small errors caused by unnecessary quality issues, to produce high quality soft foam.