The invention discloses a method for producing a rubber composite softening agent, which comprises the following steps: mixing a paraffin base softening agent, a naphthenic base softening agent and anaryl softening agent in a normal pressure blending kettle; charging low-pressure air into the normal pressure blending kettle and mixing and stirring the mixing liquid of the paraffin base softeningagent, the naphthenic base softening agent and the aryl softening agent by the air at 50 DEG C-60 DEG C; and then canning. The method for producing the rubber composite softening agent is convenient,safe and reliable and can effectively control the composite performance effect of the produced rubber composite softening agent and lead the rubber composite softening agent to be capable of meeting the production requirement of different rubber products.