The invention relates to a 
polyvinyl chloride / 
chlorinated polyvinyl chloride skin foamed sheet and a preparation method thereof, and the 
polyvinyl chloride / 
chlorinated polyvinyl chloride skin foamed sheet comprises the following materials in parts by weight: 60-90 parts of 
polyvinyl chloride, 10-40 parts of 
chlorinated polyvinyl chloride, 2.8-7 parts of stabilizer, 3-5 parts of foam 
regulator, 1-3 parts of foam nucleating agent, 0.5-2 parts of 
foaming agent, 0.6-1.5 parts of external 
lubricant, 0.5-1 part of internal 
lubricant, 0.5-2 parts of 
processing aids, 0.05-0.5 part of 
antioxidant and no more than 30 parts of filler. The preparation method is as follows: adding all the materials into a high-speed stirring 
machine, and mixing uniformly; heating to 90-120 DEG C, and carrying out heat preservation for more than 10 minutes; placing into a cold mixing 
machine, 
cooling down to 25-45 DEG C, tapping into a storage bin, extruding a foaming material through an extruder, and further carrying out vacuum shaping, cooling molding and edge trimming and finishing; and finally carrying out 
cutting and packaging according to the required length. The product has 
high surface hardness and great strength, is less prone to deformation, easy for 
processing, reasonable in manufacturing process, low in cost, good in quality and high in efficiency and has extensive popularization value and good economic and 
social benefits.