In land value-added tax (LVAT) settlement, how costs are pooled and deducted has a bearing on the determination of value-added amount, which directly affects the level of tax liability of taxpayers. Cost deduction is divided into two methods: direct deduction and apportionment deduction, and apportionment deduction includes the method of land area, building area and other methods. What is the relationship between these deduction methods and the principle of benefit? Should the principle of benefit be taken into consideration when choosing deduction methods? On the basis of sorting out the relevant policies on cost pooling deduction methods, this article is going to analyze the application of the benefit principle in land value-added tax settlement, and accordingly explain the necessity of selecting cost pooling deduction methods according to the benefit principle.