Medicine taking mechanism for intravenous medicine preparation

The invention relates to a medicine taking mechanism for intravenous medicine preparation. The medicine taking mechanism comprises a medicine dispensing bin, a medicine taking mechanical arm and a conveying line. The medicine dispensing bin is provided with a plurality of medicine storage boxes, a plurality of medicine bottles containing medicine are stored in the medicine storage boxes, and the medicine bottles are horizontally placed in the medicine storage boxes and arranged front and back. The medicine taking mechanical arm is used for taking out the medicine bottles in the medicine dispensing bin, converting the medicine bottles from a horizontal placement state to a vertical placement state and conveying the medicine bottles to the conveying line; and the conveying line comprises a conveying belt, and medicine bottle positioning blocks are fixed to the conveying belt. At least one medicine bottle positioning groove is formed in the top surface of each medicine bottle positioning block. The medicine bott