Single-pipe reducing machining equipment and machining method

The invention discloses single-pipe reducing machining equipment. The equipment comprises a rack; the buckling and pressing unit is used for buckling and pressing one end of the pipe fitting, so that a buckling and pressing head is formed at one end of the pipe fitting; the straightening unit is used for straightening the pipe fittings; the necking die drawing unit is located on one side of the straightening unit; the necking drawing die unit comprises a necking die, a reducing hole is formed in the necking die, a conical opening is formed in one side of the reducing hole, and the diameter of the reducing hole is larger than the maximum width of the buckling head; the pipe fitting penetrates through the reducing hole, and an oil spraying mechanism used for spraying oil to the pipe fitting is arranged on the necking die. The clamping die feeding unit is located on the side, away from the straightening unit, of the necking die drawing unit and used for clamping the pipe fitting and driving the pipe fitting to m