The invention relates to a killing machine and belongs to killing equipment. The killing machine comprises a trapping tube mechanism, a front push plate, a back push plate, a livestock hip driving mechanism, a strangulation mechanism, a livestock head turning mechanism, a killed livestock pushing-out mechanism, a cavity door opening and closing mechanism and a motive power transmission mechanism, wherein the trapping tube mechanism is provided with a left rotary disc and a right rotary disc. The killing machine is characterized in that a pair of guide rails are fixed on the front push plate, a hip pushing plate cavity is arranged in the center position of one end of the front push plate facing one end of the right rotary disc, the livestock hip driving mechanism comprises a first action cylinder, a second action cylinder, a sliding plate and a hip pushing plate, the first action cylinder is fixedly arranged on the front push plate, a first action cylinder post of the first action cylinder is connected with the sliding plate, the sliding plate is glidingly matched with the pair of guide rails, the second action cylinder is arranged on the sliding plate, a second action cylinder post of the second action cylinder is connected with the hip pushing plate, and the hip pushing plate corresponds to the hip pushing plate cavity. The killing machine has the advantages that the structure is simplified, an advancing and retreating moving space of the livestock after entering a cage mechanism is eliminated, and the head part of the livestock is ensured to sufficiently extend out of the left rotary disc, so the neck clamping action is smoothly carried out.