The invention discloses a novel high temperature resistant anti-seepage coating, and a preparation method and an application thereof, and belongs to the field of vapor metal infiltration. The novel high temperature resistant anti-seepage coating can realizes 900-1030 DEG C local vapor metal infiltration, and comprises 100 g of solid powder, 10-50 ml of a liquid binder and 5-10 g of toughened fibers. The preparation method comprises the following steps: mixing above three components in proportion, uniformly stirring the three components, and brushing the obtained mixture on the surface of a part to form a continuous and compact film shell. The anti-seepage coating has the advantages of simple ingredients, convenience in operation, easiness in brushing of a complex surface, realization of thorough prevention of seepage, easiness in cleaning, and no binding or corroding influences on the precision dimension.