The invention discloses a sulfur dissolving agent for a gas field with high sulfur content, and a main agent is a disulfide in the structure as shown in general formula R-S-S-R, wherein R is selected from one of alkyl, aralkyl, hydroxyalkyl or phenyl containing 1-12 carbon atoms, a catalyst adopts organic amine, a cocatalyst adopts Lewis base, and a stabilizer adopts organic alcohol. The sulfur dissolving agent is good in sulfur dissolving effect, stable in performances and low in cost, and can be widely used for relieving sulfur sedimentation blockage in well bores of gas wells with high sulfur content, ground pipelines, valves, screen meshes and the like.