The invention provides double component-based universal type water-based heat sealing adhesive for mechanical equipment packaging as well as a preparation method thereof. The double component-based universal type water-based heat sealing adhesive comprises a component A and a component B which are mutually independent, wherein the component A is an adhesion main body part and has the main effect of heat sealing adhesion strength; and the component B is used for adjusting performance and is cooperatively used with the component A. The component A is prepared from modified water-based polyolefinresin liquid, water-based polyester resin emulsion, a water-based aid and deionized water. The component B is prepared from water-based SBS resin emulsion, low-density polyethylene wax emulsion, styrene acrylate spherical hollow polymer emulsion, a water-based aid and deionized water. The components are prepared by the process of mixing and stirring uniformly. Compared with the prior art, the double component-based universal type water-based heat sealing adhesive has the remarkable beneficial effects: the application range is wide, base materials with different specifications and different manufacturers can be adapted, the influence on air permeability of dialyzing paper is little and the storage stability is more excellent.