In order to resolve the hot temperature tolerance of cucumber in summer, the different temperature and difference concentration treatment of Salicylic acid were studied during the germination of cucumber seeds. Results show that the optimum germination temperature of cucumber seeds is 30 ℃; the vigor of germination decreases remarkably at the temperature of 25 ℃ and 35 ℃. Salicylic acid treatment can improve the germination ability of cucumber seed at high temperature (35 ℃), the optimal pretreatment concen...