The invention discloses waterborne
epoxy resin modified emulsified
asphalt, which contains emulsified
asphalt and self-emulsifying waterborne
epoxy resin, wherein the volume ratio of the emulsified
asphalt to the self-emulsifying waterborne
epoxy resin is 1: (0.2-0.8); the emulsified asphalt is nonionic emulsified asphalt, anionic emulsified asphalt or cationic emulsified asphalt, and the
solid content of the emulsified asphalt is 20 to 60 percent; and the self-emulsifying waterborne epoxy resin contains waterborne epoxy resin curing agent, water and liquid epoxy resin in a
mass ratio of 1: (0.8-2): (2-5). The invention also discloses a preparation method for the waterborne epoxy
resin modified emulsified asphalt and application in preparation of an asphalt type waterproof
coating. After the common commercial emulsified asphalt is modified by the waterborne epoxy resin, the break elongation of the emulsified asphalt can be improved, and the modified emulsified asphalt has high
adhesive strength with a
base plane, certain strength and high waterproof property and
ageing resistance; and the modified emulsified asphalt can be used for making the asphalt type waterproof
coating, and can also be used for repairing road pavements.