The utility model relates to a device that collect, storage rainwater is used for flue -cured tobacco irrigation of arid mountain region, include retaining cellar, natural irrigation canals and ditches and outlet pipe, through setting up the water piping connection that advances who pushes up the side in the cellar that impounds, the outlet pipe setting is in the another side at retaining cellar top between retaining cellar and the natural irrigation canals and ditches, and the immersible pump of placing bottom the cellar that impounds is connected to the one end of outlet pipe, and portable water lift equipment is connected to the other end of outlet pipe, pilots a ship into harbour to tobacco field. The retaining cellar is round platform shape, is provided with the waterline at the cellar top that impounds from entrance of cellar 30cm~50cm department, and the mouth of pipe of inlet tube and outlet pipe all is higher than the waterline. The entrance of cellar of retaining cellar is provided with the lid that matches with the entrance of cellar diameter. The utility model discloses effectively regulation rain water use is satisfied yunnan rain and is supported arid mountain region flue -cured tobacco transplantation phase supplemental irrigation demand, realizes rainwater agricultural high efficiency utilization.