Driven by huge demand for talents in the market, economics major in colleges and universities need to take the initiative to reform the teaching of finance specialty in accordance with the demand for finance talents in the era of big data, cultivate versatile innovative competent talents, and output high-quality talents for social enterprises, satisfy enterprises’ needs of recruiting financial talents, and give full play to the social education value of university finance specialty. Financial management is the core of economic organization, and the management effectiveness affects the overall operational feasibility of the organization. In order to promote the high-quality development of the market economy, universities should devote greater effort to the teaching reform of financial management, enhance talent cultivation conversion efficiency, and give full play to the value of the financial specialty in colleges and universities. However, the existing course teaching can hardly achieve the expected goals due to insufficient monitoring of financial management teaching process, insufficient self-learning resources, and defective student learning support service, imperfect teacher's training, single assessment method, and small proportion of practical teaching, etc. In view of the current status, this paper innovatively introduced six sigma management theory to improve the online teaching of financial management courses. Firstly, the teaching process involving five stages of define-measure-analyze-improve-control was designed according to the course characteristics of financial management and at the same time, the financial management teaching model was improved by online and offline inquiry-based teaching method. In order to improve the application effectiveness of financial management online teaching resources, a precise teaching resource push system was established using Web data mining so as to achieve the goal of recommending different teaching resources to different students. It was proved by the teaching practice that the new teaching method proposed in this study can help students improve learning efficiency and enhance their problem-solving ability. Thus, this teaching model is worthy of application and promotion in courses of finance specialty.