Through the investigation of the pressure measurement system of the ground tester of the aviation electromechanical hydraulic, environmental control, fuel oil and other professional products, the existing problems of the measurability are found. In this paper, the measurability problems of the pressure measurement system of the ground tester of the aviation electromechanical products are divided into unreasonable technical indicators, unreasonable selection of measuring instruments, reasonable pipeline design and unreasonable layout of the tester. Four aspects are introduced in detail one by one. Finally, three suggestions are put forward to improve the measurability of the pressure measurement system of the ground tester of the aviation electromechanical products.