The invention discloses a seashell-diatom ooze wall surface decoration wall material and a production and construction method thereof. The decoration wall material comprises: 20 to 98 parts of shell powder, 8 to 30 parts of silica, 4 to 100 parts of kieselguhr, 2 to 20 parts of medical stone, 3.8 to 48 parts of mica powder, 2 to 10 parts of magnesium-rich silicate, 6 to 26 parts of scolecite, 1.5to 36 parts of hydrosilicate, 0 to 50 parts of titanium dioxide powder, 2 to 50 parts of calcium carbonate, 0.1 to 0.3 part of vegetable fiber, 1 to 30 parts of pigment, 4.8 to 40 parts of kelp powder, 1 to 30 parts of cold soluble polyvinyl alcohol powder and 1 to 20 parts of hydroxypropyl methyl cellulose. The production and construction method comprises: placing the raw material components into a stirrer for uniform stirring; filling the mixture in bags, packing the bags in boxes, sealing the boxes and storing the boxes in a storehouse; adding water into the mixture and stirring the mixture uniformly; and pasting the mixture on a wall surface to be decorated to make various texture patterns. The seashell-diatom ooze wall surface decoration wall material has the advantages of: (1) soft texture and no toxicity, fading nor stripping; (2), characteristics of eliminating indoor pollution, regulating indoor humidity, eliminating odor, isolating noises and offering high skin texture feel; (3) fire proofing and flame retarding; and (4) rich color.