Abstract: [Objective] This project aims at studying the effects of different concentrations of sea water on the germination of muskmelon seeds, exploring the tolerance to salt in the hope of providing the foundation for selecting and breeding salt tolerant melon varieties and utilizing seawater resources and beach land.[Method]Using petri dishes sprouting method, the effects of different concentrations of seawater-stress on germination rate, germination potential, germination index, average germination speed of seven varieties melon seeds were studied.[Result]The results showed that low concentration seawater could promote Jinmi 6 muskmelon and Hongsucui melon seed germination;A high concentration of seawater-stress had inhibitory effects on melon seed germination ability;With the increase of seawater concentrations, the inhibitory effects were strengthened.Different varieties of melon seeds have different salt tolerance.Considering the 4 indexes of germination rate, germination potential, germination index and average germination speed of muskmelon seeds, Muskmelon Jinmin 6 was the most salt-tolerant variety, and Xizhoumi17 was the weakest one.[Conclusion]After comparing and studying, the seed salt tolerance of Jinmin 6 is better, and it can be planted in salt stress area.