The invention discloses an accurate-temperature-control grain storage simulation bin. The wall of a simulation bin body is provided with a temperature control layer, a movable top cover is arranged atthe top of the bin body, and the bottom of the bin body, the temperature control layer and an interlayer of the movable top cover are internally provided with heat preservation layers. The outer sideof the lower end of the temperature control layer is provided with a water inlet, and the outer side of the upper end of the temperature control layer is provided with a water outlet and an overflowport. A ground cage is arranged at the bottom inner center of the bin body, and the bin wall is provided with a gas inlet communicated with the interior of the ground cage. The upper end of the bin body is provided with a gas outlet, a grain condition detection and control device, a nitrogen concentration detector and an electronic thermohygrograph are connected with a control panel and arranged on the inner upper portion of the bin body, and the grain condition detection and control device is connected with a temperature measurement cable. The accurate-temperature-control grain storage simulation bin is accurate in temperature control, and accuracy reaches +/-0.1 DEG C.