The invention relates to a reverse rolling fork type actuator for a travel switch, which comprises a shell, a transmission mechanism, and a push rod, wherein the transmission mechanism comprises a rotating shaft with a rotating arm and a cam with an irregular section, the cam is sleeved at the head end of the rotating shaft, the cam and the rotating shaft are in tight fit, the head end is positioned above the push rod, the upper end of the push rod is provided with an axial groove, a roller is fixed in the groove through a pin shaft and is engaged with the cam, and the cam is provided with a protruding part positioned at the upper-right part of the cam. Compared with the prior art, the actuator has the advantages of compact structure, steady performance, reliable work, and long service life.