The invention provides a water-permeable
coating, and a preparation method and an application thereof. The water-permeable
coating comprises modified resin and a modified curing agent, wherein the
mass ratio of the modified resin to the modified curing agent is 1: (0.1-0.6); the modified curing agent comprises a curing agent and an auxiliary agent in a
mass ratio of 1: (0.05-0.3); and the modifiedresin comprises resin and a
diluent in a
mass ratio of 1: (0.05-0.3). The
coating prepared by taking the modified resin and the modified curing agent as raw materials has water permeability and low
viscosity; when the water-permeable coating is sprayed onto a water-permeable pavement for repairing, pores of the water-permeable pavement cannot be blocked, that is, the water permeability of the water-permeable pavement cannot be affected; meanwhile, the water-permeable coating is low in
viscosity and good in flowability, can form a horizontal spraying layer on the water-permeable pavement, realizes repairing of the water-permeable pavement, and is simple, convenient, quick and effective; and by limiting of the
mass ratio of the modified resin to the modified curing agent, the
curing time ofthe prepared coating can be prolonged, and the
operability of the coating in the spraying process is improved.