An induction motor stator encapsulate method, including arranging a stator of an induction motor in a case of the induction motor, wherein the stator comprises a stator core and a stator winding surrounding the stator core; filling a first encapsulating material into the case for forming a first insulation layer, wherein the first insulation layer directly covers the stator winding; and filling a second encapsulating material into the case for forming a second insulation layer, wherein the second insulation layer covers the first insulation layer; wherein a shrink rate of the first encapsulating material is smaller than a shrink rate of the second encapsulating material.