The utility model discloses a solvent-removing-type erasing device for penetration testing. The solvent-removing-type erasing device for penetration testing comprises a handle box, a compression spring as well as a fixing bolt; the compression spring is arranged in the handle box; the upper part of the compression spring is fixedly connected with the upper part of the handle box, and the lower part of the compression spring is fixedly connected with the fixing bolt; the upper part of the fixing bolt penetrates through the bottom of the handle box; the fixing bolt is sleeved by a regulating nut and a fixing nut; the regulating nut is arranged above the fixing nut; towels or paper for erasing a penetrating agent wrap the head part of the fixing bolt, and the towels or paper and the fixing bolt are compressed and fixed by means of the fixing nut. The solvent-removing-type erasing device for penetration testing, which is provided by the utility model, is very simple in structure, is convenient to use, can complete the erasing operation, and also can control the maximal pressure applied to coarse cotton cloth and surfaces of workpieces by controlling the compression length of a compression spring so as to reduce influences by artificial factors and guarantee that different detectors obtain the consistent sensitivity grades.