The invention relates to the field of well completion sand prevention of gravel filling of horizontal wells and discloses a feeding grip releasing tool for gravel filling of a sand control pipe column of the horizontal well. An in-pipe suppressing grip releasing mode or an out-pipe suppressing grip releasing mode can be adopted, and the feeding grip releasing tool is composed of three parts including a seat seal conversion mechanism, a positively-rotary feeding mechanism and a hydraulic stage-by-stage grip releasing mechanism; the upper end of the seat seal conversion mechanism is in threaded connection with a piston of a seat seal tool body, and the lower end face of the seat seal conversion mechanism directly make contact with a packer external pushing cylinder needing to be fed; and the positively-rotary feeding mechanism and the hydraulic grip releasing mechanism are sequentially arranged in the seat seal conversion mechanism from top to bottom, the upper end of the positively-rotary feeding mechanism is in threaded connection with a core shaft of the seat seal tool body, and the lower end of the hydraulic grip releasing mechanism is in threaded connection with other service tool bodies. According to the feeding grip releasing tool for gravel filling of the sand control pipe column of the horizontal well, in the process that the sand control pipe column is put into the well, positively-rotary in-putting can be achieved, blocked possibility of the pipe column is reduced, the grip releasing mode has two types including the hydraulic type and the mechanical type, hydraulic grip releasing is low in pressure, the shear value is stable and reliable, the torque value of the pipe column is low in the mechanical grip releasing process, and the operation security coefficient is high.