The invention discloses a polyvinyl chloride tubular product and a preparation method thereof and relates to the field of plastic tubular products. The polyvinyl chloride tubular product is prepared from, by weight, 75 parts of PVC, 25 parts of light calcium carbonate, 3-5 parts of a heat stabilizer, 1-3 parts of a lubricant, 5-8 parts of CPE, 2-5 parts of ACR and 0.8-1.5 parts of molybdate red, and the preparation method comprises the seven process steps of raw material weighing, hot mixing, cooling mixing, extrusion, vacuum cooling, cutting and flaring for forming and packaging. The preparation method is simple, the production efficiency is high, the preparation process is simple, low in cost and high in preparation efficiency, the prepared polyvinyl chloride tubular product is good in tensile property and impact resistance, and brittle failure does not easily occur.