A method for purification and recovery of an organic liquid by using an apparatus, wherein the apparatus comprises: a distillation kettle , a receiver tank connected to the distillation kettle by a distillation pipe , and a vacuum pump ; a vacuum storage tank is arranged between the receiver tank and the vacuum pump ; the vacuum storage tank and the receiver tank are connected by a vacuum regulating pipe ; a first vacuum regulating valve being arranged on the vacuum regulating pipe ; and the vacuum storage tank and the vacuum pump are connected by an evacuation pipe , a second vacuum regulating valve being arranged on the evacuation pipe ; characterized in that the method comprises: 1) feeding the organic liquid to be processed into the distillation kettle ; 2) disabling communication between the vacuum storage tank and the receiver tank , turning on the vacuum pump to evacuate the vacuum storage tank to a preset value and then turning off the vacuum pump , and disabling communication between the vacuum pump and the vacuum storage tank ; 3) enabling the communication between the vacuum storage tank and the receiver tank , the organic liquid being distilled off and collected in the receiver tank ; 4) repeating steps 2) and 3) in turn in an event of insufficient vacuum in the vacuum storage tank ; and 5) repeating step 4) for a plurality of times until there is no more liquid distillate being produced. a distillation kettle , a receiver tank connected to the distillation kettle by a distillation pipe , and a vacuum pump ; a vacuum storage tank is arranged between the receiver tank and the vacuum pump ; the vacuum storage tank and the receiver tank are connected by a vacuum regulating pipe ; a first vacuum regulating valve being arranged on the vacuum regulating pipe ; and the vacuum storage tank and the vacuum pump are connected by an evacuation pipe , a second vacuum regulating valve being arranged on the evacuation pipe ; characterized in that the method comprises: 1) feeding the organic liquid to be processed into the distillation kettle ; 2) disabling communication between the vacuum storage tank and the receiver tank , turning on the vacuum pump to evacuate the vacuum storage tank to a preset value and then turning off the vacuum pump , and disabling communication between the vacuum pump and the vacuum storage tank ; 3) enabling the communication between the vacuum storage tank and the receiver tank , the organic liquid being distilled off and collected in the receiver tank ; 4) repeating steps 2) and 3) in turn in an event of insufficient vacuum in the vacuum storage tank ; and 5) repeating step 4) for a plurality of times until there is no more liquid distillate being produced. 1) feeding the organic liquid to be processed into the distillation kettle ; 2) disabling communication between the vacuum storage tank and the receiver tank , turning on the vacuum pump to evacuate the vacuum storage tank to a preset value and then turning off the vacuum pump , and disabling communication between the vacuum pump and the vacuum storage tank ; 3) enabling the communication between the vacuum storage tank and the receiver tank , the organic liquid being distilled off and collected in the receiver tank ; 4) repeating steps 2) and 3) in turn in an event of insufficient vacuum in the vacuum storage tank ; and 5) repeating step 4) for a plurality of times until there is no more liquid distillate being produced. <EOS>