Financial management is the key to the development of a company,which is conducive to collecting and analyzing all internal fund flows within the group company.However,there are also many shortcomings in financial management that need to be optimized and improved.However,applying comprehensive budget management in the financial management of group companies can effectively address the aforementioned shortcomings and promote stable and sustainable development of the group company from the root.Therefore,the article briefly describes the content and application advantages of comprehensive budget management,analyzes the current application status of comprehensive budget management in financial management of group companies,proposes corresponding application strategies,in order to improve the financial management level of group companies and provide reference for similar research.