The invention provides a multifunctional and full-automatic steel pipe transfer operation machine, which comprises a power driving mechanism and a plurality of parallel gear type stepping transverse mechanisms, wherein each gear type stepping transverse mechanism is respectively provided with a working station mechanism which is matched with the working station setting according to the working station setting, each gear type stepping transverse mechanism comprises a case body, each case body is provided with a driving shaft which is sheathed with a driving gear, the driving shafts of two adjacent gear type stepping transverse mechanisms are connected, each driving gear is used for driving two symmetrical driven gears, the same-radius edges of the two driven gears of each driving gear are respectively provided with a crank support assembly, and each crank support assembly is connected with a material taking plate through a material taking bracket. The machine has the advantages that the arrangement with dense working stations can be continuously executed and operated, the uniform material taking and placing is realized, and the machine is suitable for the process working stations in the continuous operation; the automation degree is high, the occupation space is little, the structure is compact, the working efficiency is high, the effects of continuity, safety and reliability are realized, and the like.