The utility model relates to the technical field of freshly squeezed fruit juice vending equipment, in particular to a juicing pretreatment system of a freshly squeezed fruit juice vending machine, which comprises a frame, a fruit storage mechanism, a horizontal inserting mechanism, a vertical inserting mechanism, a peeling mechanism, a sectioning mechanism and a pitting mechanism. The horizontalinserting and taking mechanism comprises a horizontal two-axis linear module and a horizontal contact pin; the vertical inserting and taking mechanism comprises a vertical linear module, a vertical sliding support, a fruit rotating shaft, a fruit rotating shaft driving mechanism and a vertical inserting needle. Wherein a peel collecting cylinder is arranged on the rack; the sectioning mechanism comprises a sectioning knife, a pulp accommodating box, a rotary feeding plate and a rotary feeding plate driving mechanism; the kernel removing mechanism comprises a kernel ejector and a kernel shifting mechanism; and the kernel pulling mechanism is used for pulling the kernels ejected by the kernel ejector from the vertical contact pin into the peel collecting cylinder. The full-automatic fruit juicing machine is used for carrying out juicing pretreatment such as peeling, slicing and denucleating on fruits, can feed the sliced fruits into a juicing mechanism one by one, and has the advantage of being high in automation degree.