In view of the"fragmentation"phenomenon of government budget performance,this paper aims at analy-zing the causes of symptoms from three aspects:vertical,horizontal and internal,so as to introduce the integration mecha-nism for solve the problem.The concept of overall budget performance is proposed by connecting multiple projects,subjects and policies with budget funds as the main line,aiming to continuously improve the overall output level of budget funds.In order to achieve the optimization of budget performance governance,we need to take public value as the core to reshape the overall performance concept,take overall arrangement as the key to integrate the power and resources of horizontal and ver-tical government departments,reconstruct the whole process of government budget performance based on trust and coopera-tion,and take the construction of digital government as a breakthrough to strengthen empowerment,and promote the contin-uous production and improvement of the overall budget performance.