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This invention relates to the field of photovoltaic cable manufacturing technology, and more particularly to a solar photovoltaic cable and its manufacturing process. The process includes: processing a tin-plated cable core according to a pre-process; extruding the tin-plated cable core through an extruder with preset extrusion parameters to perform a first functional layer extrusion; pre-cooling the extruded cable; determining a second preset pulling speed for the second functional layer extrusion process based on a first excess value when the functionality is deemed unqualified, and further determining a second preset pulling speed based on a first excess value when the functionality is deemed unqualified after the pre-cooling stage; and adjusting the cooling temperature based on a second excess value when the cooling is deemed unqualified, and based on a second excess value when the cooling is deemed unqualified, after the cooling is deemed unqualified. This invention can comprehensively assess the manufacturing quality of photovoltaic cables from multiple dimensions and deeply refine it from a single dimension, and automatically feed back and adjust the parameters for manufacturing photovoltaic cables to improve the stability of the performance and the stability of the manufacturing process of photovoltaic cables.