The invention discloses fluorine-containing polymer auxiliary master batch with an effect of eliminating melt fracture. By using the fluorine-containing polymer auxiliary master batch to improve the flowability of UHMWPE/PE alloy, the 'sharkskin' phenomenon in alloy extrusion is reduced. According to the technical scheme, the fluorine-containing polymer auxiliary master batch is prepared by usingfluorine-containing polymer auxiliaries as the additives and using different types of polyethylene materials as the matrix resin. The fluorine-containing polymer auxiliary master batch is prepared by,by mass percentage, 95-99% of polyethylene resin and 1-5% of fluorine-containing polymer auxiliaries. A preparation method of the fluorine-containing polymer auxiliary master batch includes the stepsof firstly, drying; secondly, weighing materials; thirdly, mixing; fourthly, performing extrusion granulation. The prepared fluorine-containing polymer auxiliary master batch is good in surface smoothness, capable of improving the 'sharkskin' phenomenon of the UHMWPE/PE alloy, capable of increasing productivity and lowering energy consumption and beneficial to the forming of UHMWPE/PE alloy pipes.