The utility model discloses a tension compression and torsional vibration fatigue test device, which can be used for finishing tension compression and torsion fatigue test at the same time. The test device comprises a test device rack, a torsion test mechanism and multiple tension compression test mechanisms, wherein in each tension compression test mechanism, a piston rod of a tension compression acting cylinder, a force sensor, a guide rod, an adjusting rod and a tested workpiece are connected end to end in sequence; a plurality of adjusting positions are set on each adjusting rod; each guide rod is connected to a corresponding adjusting position on each adjusting rod according to the size of each tested workpiece; each guide rod moves linearly under the limit of each guide mechanism; in the torsion test mechanism, the rotating ends of bearing revolving mechanisms are connected with the other end of each tested piece; swinging rods in each bearing revolving mechanism are connected in series through a connecting rod mechanism; each swinging rod positioned at one end is further connected with a piston rod of a torsional acting cylinder through one connecting rod mechanism; the tension compression acting cylinders, the bearing revolving mechanisms and the torsional acting cylinder are fixed on the test device rack.