Pavement interlocking blocks has been widely used in the road and storage yard of water transport engineering in China. The shape of interlocking block is special-shaped and has two-way interlocking function，and its compressive strength is a necessary inspection index required in JTS 257—2008 Standard for quality inspection of port waterway engineering construction.GB/T 28635—2012 Precast concrete paving units and GB 32987—2016 The method for performance of concrete paving units do not specify the method for measuring the compressive area of special-shaped blocks，which cannot meet the compressive strength test of interlocking blocks. For this reason，by analyzing the relevant standards at home and abroad，combined with the actual test methods and testing experience used in the project，a test method for the compressive strength of the interlocking block with the characteristics of water transportation engineering is proposed to correctly evaluate the compressive strength of the interlocking block，ensure the safety of the interlocking block paving project，and promote the high-quality development of the road yard of the water transportation project.