The present invention relates to a mechanized dry transplanting method for rice, and belongs to the technical field of cultivation for agricultural crops. The method comprises the following steps: (1) seedling raising: adopting a plug for seedling raising, wherein the plug comprises a plate body and a bowl body, the bowl body is an inverted circular truncated cone which is located in the plate body, seedling culturing soil and rice seeds are inserted into the bowl body, and the seedling age of the seedling is 20-30 days; (2) soil preparation: after wheat or rapeseed is harvested, applying a rice basal fertilizer, carrying out rotary tillage on the land and preparing the furrow ridge; (3) dry transplanting: adopting a dry planting machine for rice provided by the present invention for transplanting, wherein the dry planting machine for rice comprises a driving apparatus, a seedling placing platform, a seedling separating track, a press wheel and at least one soil cover mechanism, as the rice dry planting machine constantly marches forward, the seedling constantly falls into a ravine and the ravine is filled by soil; and (4) irrigation: in 2 to 3 hours after the rice seedling is dry transplanted, irrigating water to prevent the seedling from being sunburn. According to the method provided by the present invention, mechanized operation for dry transplant for rice can be realized, so that the method is applicable to large-scale production application, low in cost and highly effective.