The utility model discloses a rice field soil water extraction device. The rice field soil water extraction device comprises a water intake bottle and a water intake pipe which is made from PVC (Polyvinyl Chloride) material, wherein a storage layer is arranged at the bottom of the water intake pipe; a water seepage area is arranged above the storage layer; the water seepage area comprises a plurality of water seepage holes and a filtering layer; the plurality of water seepage holes are formed in the wall of the water intake pipe; the water seepage holes in the external wall of the water intake pipe are coated with the filtering layer; an opening is formed in the upper end of the water intake pipe and sealed with a first sealing cover; a water absorption pipe and a first vacuumizing pipe are arranged on the first sealing cover and connected with the first sealing cover in a sealing manner; one end of the first vacuumizing pipe is arranged in the water intake pipe; an opening of the water inlet bottle is sealed by a second sealing cover; a water inlet pipe and a second vacuumizing pipe are arranged on the second sealing cover and connected with the second sealing cover in the sealing manner; one end of the second vacuumizing pipe is arranged in the water intake bottle; one end of the water absorption pipe is arranged in the storage layer, and the other end of the water absorption pipe is connected with the water inlet pipe. On account of the particularity of the rice field soil water, the part of the water intake pipe on the ground is higher than a rice field production highest water level; meanwhile, the bottom of the water intake pipe is inserted into a soil sampling area to drill evenly; water and heat exchange inside and outside the water intake pipe can be ensured; an observed result is representative.