The invention discloses a device and method for recycling a low-concentration organic solvent, belonging to the technical field of environmental protection and solving the technical problems of high energy consumption, low purity of the recycled organic solvent and the like of the prior art. The device comprises a separation system, a concentration system and a dehydration system, wherein the separation system comprises a raw material liquid tank, a first delivery pump, a first heater, a pervaporation membrane component, a first condenser and a first vacuum pump; the concentration system comprises a separation liquid tank, a second delivery pump, a second heater, a distillation tower and a second condenser; the dehydration system comprises a concentration liquid tank, a third delivery pump, a third heater, a vapor permeation membrane component, a third condenser, a second vacuum pump and a product tank. In the device and method disclosed by the invention, the energy consumption for recycling the low-concentration organic solvent is low, and a high-purity organic solvent can be recycled, thereby saving the energy, protecting the environment and realizing an effect on turning waste into wealth.