Usually, eating salted fish in moderation will not cause cancer, but eating large quantities over a long period of time can cause cancer due to the intake of dimethyl nitrite. Salted fish belongs to pickled products, generally eating salted fish in moderation will not cause cancer or affect the health of the body, but also to a certain extent for the body to supplement protein, water, vitamins and other nutrients. However, for people who eat a lot of salted fish for a long period of time, it is easy to cause cancer, mainly because salted fish will produce dimethyl nitrite in the process of curing, which will be converted into carcinogenic dimethyl amine nitrite when it enters the body. For some long-term, a large number of people eating salted fish, but also easy to increase the risk of hypertension, cerebral infarction and other diseases, but also not conducive to kidney health, need to pay attention. In addition to salted fish, other cured products should also be eaten less or not eat, such as salted vegetables, bacon, soy sauce duck, salted duck eggs. It is recommended to pay attention to the rationality of daily diet to ensure a balanced intake of nutrients, and also avoid a large intake of salted food, so as not to affect the health of the body.