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Aiming at the situation that high-moisture rice is prone to quality deterioration during the summer storage period, a real warehouse test of high-moisture rice quality change was carried out to track and measure the moisture, fatty acid value and rice hardness during the summer using air-conditioning and temperature-controlled grain storage technology. The change of texture quality index showed that during high temperature weather, the quality changes of high-moisture rice included basically unchanged water remaining; increased fatty acid value, rice hardness, gluing and chewing properties; decreased elasticity and viscosity; basically unchanged cohesion. It can be seen that the high-moisture rice grains can safely survive the summer with the using of low-temperature grain storage technology, and can achieve the purpose of the quality maintaining and safety ensuring of stored grain.