The invention relates to a rice dryer with a good drying effect and a high screening rate. The rice dryer comprises a pedestal, a feeding chamber, a drying chamber, a storage chamber, a feeding funnel, a conveying pipeline, a solenoid valve, a feed delivery pipe and an air blower, wherein the drying chamber is internally provided with a first guide block, a second guide block and a transportationmechanism, the drying chamber is internally provided with a grid tray, a heating unit, a drying mechanism and a horizontal paving mechanism, the drying mechanism comprises a speed changing component,a driven wheel, a revolving shaft, a limiting plate, a regulation component, two fan blades and two limiting rods. According to the rice dryer with the good drying effect and the high screening rate,the quantity of rice which enters the feeding chamber is controlled by the transportation mechanism and a pressure sensor, so that the rice which enters the drying chamber is convenient to pave horizontally and uniformly, the wind power can be adjusted by the drying mechanism, so that the rice dryer is suitable for screening rice with different weights, the rice can be more uniformly and horizontally paved on the grid tray through the horizontal paving mechanism so as to enable rice to be heated more uniformly, so that the practicability of the rice dryer is improved.