The invention belongs to the technical field of skin care, and discloses a skin barrier repair composition and a preparation method thereof. The composition is mainly prepared from the following components in parts by weight: 44.70 parts to 70.60 parts of deionized water, 0.05 part to 0.10 part of sodium hyaluronate, 0.50 part to 0.80 part of aloe vera gel juice, 0.50 part to 0.80 part of purslaneherb extract, 0.50 part to 1.00 part of radix stephaniae tetrandrae, 1.00 part to 3.00 parts of chondrus crispus extract, 1.00 part to 3.00 part of rice fermentation filtrate and 1.00 part to 3.00 part of saccharide isomerate. The preparation method comprises the following steps: A, preparing a phase solution A and a phase solution B respectively; B, adding the phase solution B into the phase solution A to obtain a mixed solution; C, adding an emulsifying agent S-305 into the mixed solution to obtain a mixed solution C; and D, adding ceramide, triethanolamine, the aloe vera gel juice, the purslane herb extract, the radix stephaniae tetrandrae, the chondrus crispus extract, the rice fermentation filtrate, the saccharide isomerate, phenoxyethanol and citrus into the mixed solution C, and performing stirring in a mixed manner to obtain skin barrier repair cream.