Over the years, the government has increased its investment in public culture. From 2000 to 2016, the total amount of cultural undertakings expenses increased by 12.2 times and per capita cultural undertakings expenditure increased by 10.9 times. The level of public cultural services continued to improve. However, it is undeniable that there are still many problems in China's public cultural input at present. The specific problems are: input is still insufficient,  investment structure is unbalanced, investment source is single, investment management is insufficient, and there is no input evaluation. Aiming at these problems, there are some feasible measures to build a scientific and reasonable public cultural fiscal input mechanism which includes perfecting funds safeguard mechanism, building a balanced structure of capital investment, improving the multiple input mechanism of funds, optimizing capital operation management system and standardizing the fund evaluation system.