The invention discloses a semi-honeycomb steel strip shaping and cutting off machine ensuring the evenness of a forced convection flow field. The semi-honeycomb steel strip shaping and cutting off machine comprises a top plate and a bottom plate, wherein the top plate and the bottom plate are horizontally arranged and are fixedly connected through a plurality of guide columns, and the guide columns are perpendicular to the top plate and the bottom plate. A press plate parallel to the top plate and the bottom plate is arranged between the top plate and the bottom plate, guide sleeves fixedly connected with the press plate are arranged on the press plate, the guide sleeves are in sliding fit with the guide columns through guide holes, a lower rack is arranged on the bottom plate, an upper rack is arranged on the press plate, the upper rack is meshed with the lower rack in a tooth shape when the press plate moves to the bottommost position, and the semi-honeycomb steel strip shaping and cutting off machine is provided with a press plate driving mechanism. According to the technical scheme, the tooth shape of a steel strip is accurately shaped, and the equipment shaping precision is high. The shaping work and the cutting off work are combined on one machine to be completed, shaping and cutting off can be conducted respectively or simultaneously through adjustment, and the semi-honeycomb steel strip shaping and cutting off machine is simple in structure and convenient to use and adjust.