PIPE FITTING CONNECTING METHOD AND CONNECTING STRUCTURE

A pipe fitting connecting method and a connecting structure, comprising the following steps of: providing an elastic sleeve (10) at the position of an end opening of a pipe material (20) in a sleeving manner, and clamping the pipe material by means of a clamping sleeve (01) of a push tool; fixing a connecting pipe body (30) to a clamping ring (02) of the push tool, the front end of an insertion end (310) of the connecting pipe body being a guiding-in section (312), the rear end of the insertion section of the connecting pipe body being an expansion section (314), the outer diameter of the guiding-in section being equal to the inner diameter of the pipe material, and a conical ring (316) with a small front end and a large rear end being provided on the periphery of the expansion section; and enabling the insertion end of the connecting pipe body (30) to be forcefully inserted into the pipe material, the pipe material and the elastic sleeve (10) being gradually expanded along the conical ring (316) of the expansion section, and when the insertion end (310) is inserted in place, the pipe material and the elastic sleeve retracting, so as to enable the pipe material (20) and the connecting pipe body (30) to be tightly connected. Without an expansion tool, expansion is conducted directly by means of the insertion end of the connecting pipe body, thereby saving a large amount of working time; the pipe material and the elastic sleeve are evenly expanded in a whole circumference manner, thereby effectively avoiding pipe material damage caused by excessive expansion.