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In this paper, a facile method for synthesizing WS₂ nanoflowers (NFs) and CdSe quantum dots (QDs) using hydrothermal and hot injection methods, are reported, respectively. Additionally, the photocatalytic activity of a CdSe QDs/WS₂ NF nanocomposite is analyzed in a typical three‐electrode electrochemical cell. It is found that the CdSe QDs/WS₂ NF hybrid exhibits a current density of −1.12 mA at 0 V and a Tafel slope of 82 mV dec⁻¹, which are superior to the values of bare WS₂ NFs (current density of −0.25 mA and Tafel slope of 150 mV dec⁻¹). This improvement of photocatalytic performance is attributed to the wide range of light absorption for e⁻/h⁺generation provided by the CdSe QDs, as well as the large surface area and numerous active sites for hydrogen production provided by WS₂ NFs. Therefore, the CdSe QDs/WS₂ NF hybrid structure is a promising candidate for highly effective and stable …