The invention discloses crack-prevention intelligent pipeline connecting equipment used for large and smart city industrial buildings. The crack-prevention intelligent pipeline connecting equipment comprises a first connecting sleeve and a second connecting sleeve, wherein both the first connecting sleeve and the second connecting sleeve adopt hollow structures, the exteriors of the first connecting sleeve and the second connecting sleeve are sleeved with protection covers, heating slots arranged spirally are formed in the inner walls of the protection covers, heating wires are arranged in the heating slots, each protection cover adopts an inner-outer two-layer structure, the heating slots are positioned in the inner walls of the inner layer structures of the protection covers, a cavity is arranged between the inner layer and the outer layer of each inner-outer two-layer structure, thermal insulation sponges are respectively adhered to the end surfaces, in opposite direction, of the inner-outer two-layer structures, mutual connection of two sections of pipelines is achieved through the first connecting sleeve and the second connecting sleeve, moreover, the protection covers and the heating wires are adopted, heating to pipelines to increase the temperature is achieved, and pipeline cracks under a low temperature state are avoided.