Helping fishery operators to develop production and circulation through low-interest, micro-interest, interest-free or discount fishery loans is an important form for the state and credit organizations to support fisheries. Fishery credit embodies the mutual assistance and cooperation between national financial and credit organizations and fishery producers, and is also an important economic lever for the state to manage and regulate fishery production. In socialist countries, the main sources of fishery credit funds are: the relevant funds allocated by the state to banks or credit organizations from relevant income every year, the idle funds deposited by enterprises and institutions in banks or credit organizations, and the personal savings of fishermen. Credit is mainly issued by the national financial department, which is divided into production cost loans, production equipment loans and other loans. In many developed capitalist countries, the funds or funds of state banks, private banks, credit organizations and even foreign fund organizations are the sources of phishing loans. The credit of small and medium-sized fishery producers in grass-roots fishery organizations can be directly provided by fishery associations, fishery associations and other production, supply and marketing economic organizations, or these organizations can underwrite loans to special credit organizations. Credit for fishermen with scattered and unorganized fishery production mainly depends on the needs of borrowers.