The invention provides a mechanical hydraulic difunctional expansion type screen pipe hanger, which is used for hanging a petroleum underground sand control screen pipe. The screen pipe hanger is characterized by comprising a hydraulic expansion type screen pipe hanger, wherein a locking spring mechanism is fixed on the lower end of the outer wall of an outer connecting sleeve of the hydraulic expansion type screen pipe hanger. The screen pipe hanger has the advantages that two sets of mechanisms realizing expansion of an expansion pipe are arranged; the expansion pipe can be expanded by the modes of hydraulic and mechanical actions, so that the expanded expansion pipe and a metallic face of a sleeve are closely contacted for seat hanging; the length of overlapped section of a seat hanging part of the screen pipe and the sleeve can be reduced; rate of oil and gas recovery after well completion can be greatly improved; inner wall and outer wall of a screen pipe cluster can be flushed before and after seat hanging; when the screen pipe hanger is lowered to a pitshaft, the screen pipe hanger can rotate to make the screen pipe cluster smoothly lowered to a predetermined position; oncedrilling can realize that the inner wall and the outer wall of the screen pipe can be flushed before and after seat hanging; the screen pipe hanger has obvious application effect in a deep well, an ultradeep well, a horizontal well and other special wells. The mechanical hydraulic difunctional expansion type screen pipe hanger overcomes the defects that the prior expansion pipe hanger does not have remedial measures once operation is failed.