In order to reveal rice plant growth and water consumption and utilization under different irrigation modes, rice plant growth and water consumption and utilization under three irrigation modes were studied by combining evaporator with field plot and comparing with the conventional submerged irrigation mode. The results showed that rice plants could adapt themselves to the changes of paddy ecosystem through water self-regulation. Irrigation mode had a significant effect on the wet base water content of rice plants (P<0.05). The control irrigation mode could effectively delay the root aging of rice at the late growth stage; as the carrier of water, the dry matter accumulation of rice plants directly affected the water consumption and control of rice. The water consumption of rice in paddy field ecosystem under irrigation mode was significantly lower than that under intermittent irrigation and conventional flooding irrigation, while the water use efficiency was greatly improved. The dry matter accumulation in later stage can be increased by growth compensation effect in the controlled irrigation mode, so as to increase grain yield. According to the evapotranspiration of rice and actual rainfall of each irrigation mode, the irrigation water of paddy field can be regulated and controlled, which can effectively maintain the balance of soil-plant-atmosphere continuum in paddy field ecosystem and ensure the sustainable development of agriculture and ecosystem. The results can provide theoretical basis and technical support for the research on water consumption and utilization of paddy ecosystem in cold and black soil region.