The invention relates to the technical field of 
high polymer materials, in particular to ABS noctilucent masterbatches and a preparation method thereof. The ABS noctilucent masterbatches comprise the following components in percentage by 
mass: 50 to 75 percent of ABS, 5 to 10 percent of dispersant, and 20 to 40 percent of noctilucent 
powder, wherein the dispersant is dimethyl 
silicon oil and / or 
polyethylene wax. The ABS noctilucent masterbatches and the preparation method thereof have the benefits that the abrasion of a 
machine caused by noctilucent 
powder during a production process is reduced and the blackening phenomenon of noctilucent 
powder is avoided by the improvements, such as extruding through a single screw, reducing extruding rate, raising 
processing temperature, mixing materials in a plastic material 
barrel at a 
low speed, of 
process conditions; the 
processing temperature is risen, the 
coating capacity of melt to the noctilucent powder is improved, and the ABS noctilucent masterbatches with higher concentration are prepared by mixing ABS powdery matrix resin and ABS particular matrix resin; the interference to the luminance caused by the color of the matrix resin is reduced by using a suitable amount of dispersant; the ABS noctilucent masterbatches prepared by the preparation method has the advantages of 
high concentration, long-acting 
luminescence, 
large molecular weight of ABS, low abrasion to the 
machine, uniform dispersion, no 
chromatic aberration, wide application range and the like.