A multi-purpose juicer, comprising: a frame assembly; a base assembly arranged under the frame assembly; and a drive assembly arranged at a side of the frame assembly; wherein the frame assembly includes a frame body, a head assembly fixed on the frame body, and a function element; wherein the frame body includes a bottom that matches with the base assembly, a first end that matches with the head assembly to form an operation cavity configured for receiving the function element, a second end that matches with the drive assembly, and wherein the drive assembly drives the function element to operate in the operation cavity; wherein the frame body comprises a lateral cylinder-shaped transferring zone and a feeding zone arranged on the transferring zone; wherein the transferring zone comprises a transferring cavity that is in communication with the feeding zone, wherein the head assembly includes a processing cavity, and wherein the combination of the transferring cavity and the processing cavity form the operation cavity; wherein the function element comprises a dernountable juicing threaded rod comprising a rotation shaft rotatably arranged in the operation cavity, and a spiral wale arranged on a surface of the rotation shaft; wherein the spiral wale comprises an outer convex and wherein a portion of the outer convex includes a tooth-shaped surface that corresponds to the transferring zone of the frame body; wherein the tooth-shaped surface includes a top that is arranged in the outer convex surface of the spiral wale; and wherein the rotation shaft comprises a spiral outthrust group that is arranged on its surface and in an interval with the spiral wale. a frame assembly; a base assembly arranged under the frame assembly; and a drive assembly arranged at a side of the frame assembly; wherein the frame assembly includes a frame body, a head assembly fixed on the frame body, and a function element; wherein the frame body includes a bottom that matches with the base assembly, a first end that matches with the head assembly to form an operation cavity configured for receiving the function element, a second end that matches with the drive assembly, and wherein the drive assembly drives the function element to operate in the operation cavity; wherein the frame body comprises a lateral cylinder-shaped transferring zone and a feeding zone arranged on the transferring zone; wherein the transferring zone comprises a transferring cavity that is in communication with the feeding zone, wherein the head assembly includes a processing cavity, and wherein the combination of the transferring cavity and the processing cavity form the operation cavity; wherein the function element comprises a dernountable juicing threaded rod comprising a rotation shaft rotatably arranged in the operation cavity, and a spiral wale arranged on a surface of the rotation shaft; wherein the spiral wale comprises an outer convex and wherein a portion of the outer convex includes a tooth-shaped surface that corresponds to the transferring zone of the frame body; wherein the tooth-shaped surface includes a top that is arranged in the outer convex surface of the spiral wale; and wherein the rotation shaft comprises a spiral outthrust group that is arranged on its surface and in an interval with the spiral wale.