The pvc soft board is a soft polyvinyl chloride plastic product made of polyvinyl chloride plastic with plasticizer added. The plasticity, fluidity, flexibility and elongation of the polyvinyl chloride are improved by the addition of a plasticizer. The processing property of the polyvinyl chloride sheet is improved, and the melt viscosity, the glass transition temperature and the elastic modulus of the polyvinyl chloride are lowered.