The invention relates to a liquid glue stopper for handling borehole wall collapsing. The liquid glue stopper comprises, by weight, 200 parts of main agent A, 1-10 parts of activating agent B and 750 parts of water, and preferably, the liquid glue stopper comprises, by weight, 200 parts of main agent A, 5 parts of activating agent B and 750 parts of water. The main agent A is composed of, by weight, 8 parts of acrylamide, 1 part of n-butyl acetate and 1 part of isopropenyl acetate. The activating agent B is composed of, by weight, 7 parts of methanal and 3 parts of phenolic resin. The liquid glue stopper is prepared through the cross-linking reaction of the main agent A and the activating agent B, and the cross-linking time is 5-90 minutes. The liquid glue stopper further comprises a gel breaker C of ammonium persulfate, and the liquid glue stopper comprises, by weight, 200 parts of main agent A, 1-10 parts of activating agent B, 0.4-1.2 parts of gel breaker C and 750 parts of water. The liquid glue stopper is large in hardness and capable of bearing construction with the 40 MPa pressure difference and withstanding the temperature of 150 DEG C. Permanent leaking stoppage can be achieved without adding the gel breaker in the liquid glue stopper, self-gel breaking can be achieved when the gel breaker is added, flowback of the liquid glue stopper is promoted, and pollution to stratums is avoided.