Metallic phase molybdenum disulfide (1T-MoS2), as one of the most studied transition metal dichalcogenides (TMDs) materials, has attracted recent attention due to its special structure, abundant active sites, and other outstanding properties. 1T-MoS2 has a wide range of applications in catalysis, sensors, batteries, and supercapacitors. Recent work on the construction and photocatalytic application of 1T-MoS2 and its composites is comprehensively summarized. The basic information of 1T-MoS2 is briefly introduced. Recent advances on the preparation of 1T-MoS2 and its composite are represented. The applications of 1T-MoS2 and its composites in photocatalysis are summarized. In addition, some prospects for the preparation and application of 1T-MoS2 based material are also given.