Public goods contribute to be an important material condition for urban construction and development. Land finance，as an important part of local public finance，can provide financial support for the supply of local public goods and urban construction. This paper constructs the evaluation index of the supply of public goods based on China's panel data of 286 prefecture level cities from 2008 to 2014. The fixed effect model is established to quantify the internal effects of land finance on the supply of public goods. The empirical results show that the land finance will aggravate the structural imbalance of the supply of public goods，land finance will increase economic public goods supply，while suppressing the non-economic public goods supply，further the authors found that this effect are different in the eastern and western regions in the comparative analysis.