The invention discloses a removing assembly and a pipe removing and exchanging method of a pipe bundle assembly. The removing assembly comprises a propping rod, a pipe plate and a heat exchanging pipe, wherein the heat exchanging pipe extends into a pipe plate hole in the pipe plate; one end of the heat exchanging pipe is positioned in a groove of the pipe plate hole, and the other end of the heatexchanging pipe is positioned at the outside of the pipe plate hole; the propping rod consists of an upper end and a lower end; the bottom surface of the upper end is in contact connection with the bottom surface of the lower end; and the lower end of the propping rod extends into the heat exchanging pipe. The method comprises the following steps: cutting the heat exchanging pipe which is connected to the pipe plate; removing weld joints of the heat exchanging pipe and the pipe plate hole; obtaining the removing assembly, and removing the heat exchanging pipe; and replacing by a new standby pipe. The removing assembly is simple in structure, convenient to operate, and high in generality; the method adopting the removing assembly effectively solves the technical problem of pipe removing and replacing in the heat exchanger manufacturing process; the pipe plate hole is not obviously damaged; the production efficiency is improved; the operation is simple, convenient and quick; in addition, a tool adopted by the method is simple in structure, recyclable, and low in cost.