SPC lock floor is mainly composed of calcium powder and polyvinyl chloride stabilizer combined in a certain proportion to form a composite floor material. It is a new material invented in response to national emission reduction, hard SPC indoor floor. SPC floor uses calcium powder as the main raw material, extruded sheet after plasticization, four-roll calendering hot-applied color film decorative layer and wear-resistant layer, does not contain heavy metal formaldehyde with harmful substances, is 100% formaldehyde-free environmental protection floor, is a real 0 formaldehyde floor.