The invention relates to a low-temperature UV curing machine and method for preventing UV leakage. The low-temperature UV curing machine comprises a machine frame body. The machine frame body is provided with a UV lamp. Four machine frames are sequentially arranged at the four right angles of the machine frame body. The four machine frames are provided with two rotating shafts which are each in toothed connection with a driven shaft. The UV lamp is arranged in a cavity of a lampshade. The outer side wall, close to the bottom end, of the lampshade is arranged on the inner side wall of a UV leakage preventing device. A conveying belt located above a refrigeration device is arranged in a cavity of the UV leakage preventing device. The two ends of the conveying belt penetrate out of a first rectangular hole, a second rectangular hole, a third rectangular hole and a fourth rectangular hole of the UV leakage preventing device separately. The two ends of the conveying belt are each connectedwith one driven shaft. By means of the low-temperature UV curing machine and method for preventing UV leakage, the problems that heat energy generated by UV light emitted by a UV lamp tube makes the temperature of the working environment rise, the curing effect of UV printing ink can be influenced and due to the fact that the UV light is leaked to an open space, human skin can be hurt are solved.