The invention relates to a viscosity reduction method for super viscous oil and belongs to the technical field of oil recovery in oil fields. The viscosity reduction method for the super viscous oil comprises the following steps that (1), an oil-soluble viscosity reduction agent is injected into an oil layer; (2), shut in well is conduced; (3), steam is injected into the oil layer; (4), a water-soluble viscosity reduction agent is injected into the oil layer; (5), steam is injected into the oil layer; and (6), shut in well is conduced. According to the viscosity reduction method for the super viscous oil, three kinds of technology of the oil-soluble viscosity reduction agent, the water-soluble viscosity reduction agent and the high temperature steam are combined and applied, the good viscosity reduction effect is achieved for the super viscous oil with different viscosity, the viscosity reduction rate reaches 99% or over, stability is good after viscosity reduction, crude oil viscosity does not rebound, the viscosity reduction cost is low, and the requirement for super viscous oil development in Henan oil fields is met.