the present invention relates to a non - pvc type calendered polyolefin sheet and the preparation process thereof , characterized in that a polyolefin material composition which is different from polyvinyl chloride is processed by the calendering process to produce polyolefin plastic sheets ; the process includes that first of all raw materials are evenly blended in a mixer , homogeneously melt - mixed in banbury mixer , then fully gelled in a roll mill , thereafter calendered in a calender into the sheet which can be pattern - embossed with a set of embossing rolls if necessary , finally the sheet product is cooled down to fix the pattern .