Utilizing postpartum fresh eggs in 24 h as samples, the egg weight loss, weight ratio, density, gas chamber diameter related parameters, gas chamber height related parameters, Haugh unit, egg yolk, p H value and other parameters were investigated to build a prediction model of egg freshness evaluation and egg shelf life under the conditions of temperature(25 ± 3) ℃, relative humidity(30%-60%) in the supermarket. The results showed that Haugh value, density and the ratio of the increase of gas chamber diamet...