Abstract: In order to determine the peg strength of peanut varieties and promote the application of peanut mechanical harvesting in Fujian Province, the peg strength of 8 recognized varieties was tested. The result showed that the peg strength was between 1.2-25.8 N, with an average of 10.7 N, and more than 5 N accounted for 97.33%. The peg strength showed significant differences among different varieties. The average peg strength of Fuhua 4 was the largest（11.40 N）, while that of Puhua 2 was the smallest（9.91 N）. There were also significant differences between variety and pod plumpness, and the peg strength of full pod of most cultivars was greater than that of immature pod. The peg strength decreased significantly with increasing maturity of peanuts. Film mulching and watering improved the strength of peanut peg, but there was no significant difference with the open field treatment. There was a significant negative correlation between the water content of peg and the peg strength. Results showed that the 8 varieties were suitable for peanut combine harvesting. In order to reduce the fruit loss caused by mechanical harvesting, the varieties with small peg strength can be used during early harvest, or use film mulching and watering treatment, and reduce the soil humidity and water content of the peg in the middle and late stages of maturity.