The invention provides a capsule pulling device which comprises a working bin used for containing capsules to be disassembled and an exhaust chamber. Air is pressed into the working bin through an air inlet. The exhaust chamber is arranged above the working bin, an exhaust port is formed in the exhaust chamber, a first cylinder is arranged at the end face, away from the working bin, of the exhaust chamber, an output shaft of the first cylinder can stretch into the working bin, and an exhaust valve plate is fixedly connected to the end, stretching into the working bin, of the output shaft. A bin cover which can be sealed with and matched with the working bin is fixedly arranged at the end face, close to the working bin, of the exhaust chamber in a sleeving mode, a through pressure releasing hole is formed in the position, corresponding to the exhaust valve plate, of the bin cover, and the exhaust valve plate can seal the pressure releasing hole. According to the capsule pulling device, automatic disassembly of capsules is achieved through air pressure difference, and the defects that medicine powder is contaminated and the efficiency is low in manual disassembly are overcome.