The present invention provides flame-resistant resin component comprising: (A) at least one type of epoxy resin with biphenylic unit or naphthalenic unit; (B) at least one type of phenolic resin as hardening agent whose skeleton is formed by direct bond connection of benzene rings and which has no any spacing group between the benzene rings, as well as (C) hardening accelerator; wherein, the content of the phenolic resin in the as hardening agent is 30 weight percent to 100 weight percent of the total amount of the hardening agent. The resin component can achieve excellent flame-resistant effects under the conditions of adding flame-resistant agent. At the same time, the thermal stability is maintained and the formability and reliability are further improved.