A field experiment was carried out during winter seasons at 2016, on a private farm at the Department of Horticultural Science, Ferdowsi University of Mashhad. To evaluate the saline water drip irrigation (SWDI) (0, 1.5, 3 and 6) ds.m-1 in nutrient solution on tomato plants (Solanum Lycopersicum L Cv. Memory) under high (30°C), low (20°C) and medium (25°C) root zone temperature (RZT), an experiment was carried out as split –plot based on completely randomized design. High of the yield of a plant, total fruit and experimental were under SWDI (3) ds.m-1 compared to control, but lowest fruit diameter was under high SWDI (6) ds.m-1. SWDI 6 ds.m-1 increased firmness fruit. High RZT 30°C decreased average fruit of weight compared to RZT 25 °C. Yield of the plant, fruit diameter and experimental had not significant by RZT. RZT 25°C decreased total fruit number/ plant. Firmness fruit increased under RZT 25 °C compared to low RZT 20 °C. Interactions between RZT and SWDI were significant for all traits studied in the experiment.

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