Lithium-sulfur batteries, as a promising secondary battery system, have garnered extensive attention due to their exceptionally high energy density. However, the shuttle effect of soluble lithium polysulfides (LiPS) in traditional liquid electrolytes significantly impedes the development of lithium-sulfur batteries. In this work, a gel polymer electrolyte for lithium-sulphur batteries was prepared by using semi-in-situ polymerisation at lithium cathode with the advantage of the rapid and convenient characteristics of UV photoinitiated polymerization. This electrolyte is composed of a poly(ethylene glycol) dimethacrylate (PEGDMA) polymer crosslinked network combined with a PP separator, which can effectively suppress the shuttling of LiPS while maintaining a high ionic conductivity. Compared to the general preparation method of polymer gel electrolytes, batteries assembled using the semi-in-situ method at the lithium anode show significant improvements in the stability of the lithium anode and the retention of battery capacity. Further, the effect of monomer concentration on the performance of gel polymer electrolytes and lithium-sulfur batteries was investigated. The battery maintains a discharge specific capacity of 735.1mAh/g after 150 cycles at a 0.2 C rate, with a capacity retention rate reaching 80.8%.