Ethylene oxide is a kind of widely used organic compounds. The marginal profit level is comparatively higher all the time. Most petrochemical enterprises are equipped with this production equipment in our country. In the ethylene oxide factory measurement, there are often differences between truck scale and mass flowmeter measurement, which sometimes leads to measuring trade disputes. This paper analyses the reasons for dispersion, and puts forward countermeasures with the hope of protecting the mutual interest of buyers and sellers and promoting fair trade.