Hydrogen is regarded as a safe and sustainable supply of clean energy, which plays a very important role in alleviating the shortage of fossil energy and environmental pollution. Electrocatalytic water splitting is one of the effective ways to produce hydrogen. MoS₂ has been widely used in electrocatalytic hydrogen evolution reaction because of its low \mathrm{\Delta } G_H. This article summarizes the methods for improving the electrocatalytic hydrogen evolution performance of MoS₂, including inducing phase transition or exposing more catalytic active sites in MoS₂ through noble metal doping, and exposing more active sites or generating sulfur vacancies in MoS₂ through transition metal and non?metal doping. Meanwhile, some suggestions have been put forward to improve the catalytic performance of MoS₂.