The utility model discloses a grab cotton trolley frame, including little car frame body, little car frame body includes the backup pad, and the left side of going up the backup pad is fixed with the main tributary fagging, and the right side of going up the backup pad is fixed with auxiliary supporting plate, and the middle part of going up the backup pad has spline installation through -hole, the bottom surface shaping of main tributary fagging has a plurality of regulation splined holes, and the bottom surface of main tributary fagging is articulated to have a plurality of adjusting gears, and the middle part of adjusting gear has screw joint through hole, adjusts the double -screw bolt spiro union at screw joint through hole, and during corresponding regulation splined hole was stretched into to the upper end of adjusting the double -screw bolt, the top of adjusting the double -screw bolt was fixed with the regulating block, and it is protruding to have a plurality of splines on the lateral wall of regulating block, in the spline groove that the protruding plug bush of spline has on the inside wall of the regulation splined hole that corresponds. It can the automatically regulated pulley the height to make its main guide rail cooperate, its automatically regulated is effectual, need not to dismantle to reset, installs effectually.