The invention relates to a high-intensity heat reversible polytriazole adhesive, and preparation and application thereof. The adhesive is prepared from polytriazole polymers. The chemical structure general formula of the polytriazole polymers is shown as (I) in the specification; during the preparation of a polytriazole adhesive film, diyne monomers, diazido monomers and dihalo cross linking agents are simultaneously added into an organic solvent; stirring and mixing are performed; a base plate is coated with the materials; heat insulation is performed for 1 to 5h at 50 to 100 DEG C; then, the temperature is raised to 120 to 180 DEG C; heat insulation is performed for 1 to 8h; the materials are cooled to the room temperature; then, the base plate is soaked into de-ionized water, so that the adhesive film is automatically peeled from the base plate; drying is performed. During the preparation of the polytriazole adhesive, diyne monomers, diazido monomers and dihalo cross linking agents are mixed; the temperature is raised to 50 to 100 DEG C; sufficient stirring is performed for uniform mixing. Compared with the prior art, the adhesive has the advantages that the initial bonding intensity is high; the reversible bonding performance is good; the construction process is simple and convenient; the storage stability is high; the adhesive is applicable to application fields requiring high bonding intensity, repeated bonding and adjustable bonding.