The invention provides an alkali proof scouring penetrant and a method for preparing the same and belongs to the technical field of dyeing and finishing of textile, in particular to a penetrant. The penetrant is characterized by being prepared from the following raw materials in percentage by weight: 15 to 25 percent of secondary alkane sulfonate, 10 to 25 percent of isooctyl alcohol phosphate, 15 to 20 percent of penetrant JFC, 10 to 15 percent of heterogeneous alcohol sulfuric ester, and 25 to 30 percent of heterogeneous alcohol ether sulfuric ester. All raw materials are put in a mixed kettle in proportion, stirred at the temperature of between 40 and 50 DEG C for 30 to 50 minutes until all raw materials are completely dissolved into uniform solution, and softening water is used for diluting the mixed solution to prepare the alkali proof scouring penetrant. The penetrant has good penetration, decontamination, emulsion and dispersion performance, does not contain APEO, is green, environmentally-friendly, low in foam and easily mastered; and the penetrant can also resist high-concentration alkali, so that the penetrant has extremely good advantages, such as thorough desizing, oil removal, impurity removal, washing removal of synthetic oil preparation, improvement of capillary effect whiteness, maintenance of higher textile strength, and supply of enough quality assurance for the following processing in the pre-treatment process of textile.