The invention relates to a numerically-controlled lathe provided with a protective door control system. The numerically-controlled lathe provided with the protective door control system comprises a draught fan bin, a ventilating bin, a door lock and the protective door control system. The draught fan bin comprises a fan layer and a passage layer. The fan layer comprises a fan and a driving motor used for driving the fan to rotate forward and reversely. A baffle is arranged in the passage layer. The protective door control system is used for generating and storing operating instructions to control and manage unlocking of the door lock and forward and reverse rotation of the driving motor. By the adoption of the numerically-controlled lathe provided with the protective door control system, the internal environment and the external environment are isolated; under the condition that working of the numerically-controlled lathe is not affected, the working environment of the numerically-controlled lathe is cooled and ventilated, so that the working environment is stabilized, and the effective working time of the numerically-controlled lathe is prolonged; meanwhile, the influences of residual scraps, cooling liquid and the external environment on working of the fan can be well prevented, and the effect of removing internal impurities and external impurities is achieved; through the design of the operating instructions of the protective door control system, automatic locking and unlocking of the lock, automatic starting and stopping of the driving motor and standard management of the lock and the driving motor are achieved, and the expansibility is high.