The rapid development of more sophisticated nuclear techniques under v arious circumstances has driven the demand for radioactive monitoring.The traditional scintillation detectors generally combine the scintillator with the optical-electrical transducer in st ructure which severely limited the application and the properties of anti-electromagnetic interferences.With the advantages of low cost and good flexibility,the exploring of applying the advantages of optical fiber sensing technology to radiation dose detection field is of great research value.Based on the plastic s cintillating fiber,a radiation sensing experiment system was built.Experimental study of radiation dose detection was carried out and the experiment result was analyzed to verify the feasibility and the performance of plastic scintillating fiber applied in the field of radiation det ection.The equivalent dose curves obtained in different radiation environments were measured by the methods of pulse counting and pulse intensity respectively.The differences of radioaction dose in different r adiation environments can be distinguished by the equivalent dose curves,and the equivalent dose curve sh ows a good linearity, the fitting coefficient R^2is greater than 99%.The exp erimental result proves that the radiation dos e measurement system based on the plastic scintillating fiber has a certain sensitivity and stability in dose sensing.