The invention belongs to the technical fields of PVC (polyvinyl chloride) pipes and preparation methods thereof and particularly discloses a highly-heat-resistant impact-resistant PVC pipe and a preparation method thereof. The PVC pipe is prepared from, by weight, 100 parts of PVC, 4 parts of heat stabilizers, 1 part of stearic acid, 1 part of paraffin wax, 5 parts of titanium dioxide, 4 parts of liquid butadiene-acrylonitrile rubber, 16 parts of nano calcium carbonate, 1 part of hydroxyethyl methylacrylate, 0.25 part of N,N-dihydroxyethyl-4-methylaniline and 0.25 part of benzoyl peroxide. The PVC pipe prepared by the preparation method is high in resistance to heat and impact and easy to process, can be popularized and used as a high-performance PVC pipe and has strong market competence.