The seedling Chinese cabbage variety ‘Youlü No. 3’ was used as the material for pot experiment in a solar greenhouse. Under the blue film(B_flim), green film(G_flim), yellow film(Y_flim), red film(R_flim) and colorless film(W_flim), the leaves were foliar sprayed with 0, 12 and 24 mmol·L^-1 NaCl(B_flim0, B_flim12, B_flim24, G_flim0, G_flim12, G_flim24, Y_flim0, Y_flim12, Y_flim24, R_flim0, R_flim12, R_flim24, W_flim0, W_flim12 and W_flim24). The dry and fresh matter quality, leaf area, net photosynthetic rate (P_n), stomatal conductance (G_s), photosynthetic pigment, soluble sugar and free amino acid contents of the seedlings were measured, The compound regulation effect of foliar spraying NaCl on the growth and material accumulation of seedling Chinese cabbage under colored film spectrum was analyzed. The results showed that: (1) under the same film color, compared with the control (0 mmol·L^-1 NaCl), the growth indexes of seedling type Chinese cabbage were increased in different degrees under 12 and 24 mmol·L^-1 NaCl treatments, and the growth promotion effect of Y^film12 treatment was the largest. The fresh matter mass, dry matter mass, leaf area and soluble sugar content were significantly increased by 54.40%, 45.06%, 38.99% and 76.77%, respectively compared with W_film0 treatment; R^film12 and W^film12 treatments had greater growth promoting effect, but B^film12 treatment was more beneficial to the accumulation of free amino acids and soluble proteins and the formation of chlorophyll. (2)Under the same salt concentration (0-24 mmol·L^-1 NaCl), the dry and fresh matter accumulation of seedling Chinese cabbage under the five colored films was the largest in Y_film0 treatment, the larger in W_film0 treatment, the lower in R_film0 treatment, and the lowest in B_film0 and G_film0 treatment. (3) Spraying 12 mmol·L^-1 NaCl on the leaf surface not only has a strong superposition effect on the increase of soluble sugar content under the red film and photosynthetic pigment content under the blue film, but also has a strong compensation effect on the decrease of dry matter accumulation, soluble sugar content, P_n and G_s under the blue film, and leaf area under the red film, free amino acid content and soluble protein content. (4) The dry and fresh matter quality, soluble sugar content, photosynthetic pigment content, P_n and other dependent variables of seedling Chinese cabbage under colored film were not only regulated by direct path factors of R and fr spectral range parameters, but also by R∶FR and B∶R spectral proportion parameters; Leaf area is also regulated by spectral characteristic parameters such as YR, R∶ FR, B∶ y and B∶ G. It was found that under the five colored films, the foliar spraying of low concentration NaCl had a promoting effect on the growth and material accumulation of seedling Chinese cabbage, and there were both synergistic and compensatory effects. The yellow film, especially the foliar spraying of 12 mmol·L^-1 NaCl under the yellow film, had the best promoting effect on the growth of seedling Chinese cabbage.