The invention discloses a poultry/livestock feeding device which comprises a wallboard, wherein the front and back surfaces of the bottom of the wallboard are respectively fixedly connected with a base; the right end of the top of the base is fixedly connected with a second slide rest; the top end of the second slide rest is provided with a slide slot; the right side of the wallboard is sequentially fixedly connected with a guide roll and a first slide rest from top to bottom; the lower end of the right side of the first slide rest forms a sliding connection with a sliding plate; the top end of the sliding plate is fixedly connected with a pull ring; and the right side of the sliding plate is fixedly connected with a folding plate. Under the actions of the second slide rest, the slide slot, a slider and the folding plate, the demand of people for the horizontal retractable adjustment of the feeding trough can be satisfied, and under the actions of the motor, a pull rope, the pull ringand a retractable link, the demand of people for the adjustment of the feeding trough in the vertical direction is satisfied, thereby solving the following problem: the feeding trough of an existing poultry/livestock feeding device is in a fixed structure, thereby occupying large area of a cultivation house, and lowering the poultry/livestock feeding effect.