A differential feeding lasting machine for stitching an insole to an upper, comprising: a body, having a main shaft and a swing arm, wherein the main shaft is capable of driving the swing arm to swing; a feeding mechanism, having a feeding shaft that can be driven by the swing arm and a feeding wheel located outside the body, wherein the feeding shaft can drive the feeding wheel to rotate; a presser foot mechanism, having a presser foot frame mounted on the outside of the body, wherein the presser foot frame is arranged with a presser foot wheel on one outer peripheral side of the feeding wheel and a presser foot driving source capable of driving the presser foot wheel to rotate; an adjusting mechanism, having an adjustment driving source and an adjustment transmission assembly located between the adjustment driving source and the swing arm, wherein the adjustment driving source can perform rotary motion according to a plurality of rotation angles, and the adjustment transmission assembly is driven by the adjustment driving source to move relative to the swing arm for changing the swing amplitude of the swing arm, and thus the swing arm of changed swing amplitude can adjust the rotation amount of the feeding wheel; and a control mechanism, electrically connected to the presser foot driving source and the adjustment driving source, wherein the control mechanism is used to control the operating state of the presser foot driving source and the adjustment driving source for adjusting the rotation speed of the presser foot wheel and the rotation speed of the feeding wheel, characterized in that the adjusting mechanism is arranged with an adjustment gear set between the adjustment driving source and the adjustment transmission assembly, and wherein the adjustment gear set can be used to change the magnitude of torque generated by the adjustment driving source. a body, having a main shaft and a swing arm, wherein the main shaft is capable of driving the swing arm to swing; a feeding mechanism, having a feeding shaft that can be driven by the swing arm and a feeding wheel located outside the body, wherein the feeding shaft can drive the feeding wheel to rotate; a presser foot mechanism, having a presser foot frame mounted on the outside of the body, wherein the presser foot frame is arranged with a presser foot wheel on one outer peripheral side of the feeding wheel and a presser foot driving source capable of driving the presser foot wheel to rotate; an adjusting mechanism, having an adjustment driving source and an adjustment transmission assembly located between the adjustment driving source and the swing arm, wherein the adjustment driving source can perform rotary motion according to a plurality of rotation angles, and the adjustment transmission assembly is driven by the adjustment driving source to move relative to the swing arm for changing the swing amplitude of the swing arm, and thus the swing arm of changed swing amplitude can adjust the rotation amount of the feeding wheel; and a control mechanism, electrically connected to the presser foot driving source and the adjustment driving source, wherein the control mechanism is used to control the operating state of the presser foot driving source and the adjustment driving source for adjusting the rotation speed of the presser foot wheel and the rotation speed of the feeding wheel, characterized in that the adjusting mechanism is arranged with an adjustment gear set between the adjustment driving source and the adjustment transmission assembly, and wherein the adjustment gear set can be used to change the magnitude of torque generated by the adjustment driving source.