80%，成熟期55%。The field experiment was conducted to investigate the effect of irrigation models (drip irrigation under plastic mulching (MDI), drip irrigation (DI) and subsurface drip irrigation (SDI)) and irrigation start point on water consumption and yield of sweet melon. The results showed that under the same irrigation start point: MDI increased the yield by 16.0% compared with DI; MDI increased the yield by 7.5% compared with SDI; SDI increased the yield by 7.9% compared with DI. The average water consumption for MDI, SDI and DI were 193.0mm, 217.3mm, 239.3mm respectively. Under the same drip irrigation model, the treatment of irrigation start point of 60% field capacity in extension vine and flowering fruit stage, yield increased by 21.0% compared with the treatment of 40% field capacity; the treatment of irrigation start point of 80% field capacity in fruitage stage, yield increased by 9.3% compared with the treatment of 70% field capacity. The appropriate irrigation start points (the percentage of field capacity) for the sweet melon were: seedling stage (65%), extension vine and flowering fruit stage (60%), fruitage stage (80%), mature stage (55%).