Abstract: Thermal neutron radiography is a useful complementary tool of the other non-destructive testing methods for the hydrogenous materials and heavy metal subassembly,and thermal neutron tomography has not been developed in China.By the use of the CCD-based thermal neutron digital radiography facility in SPRR-300 reactor and the Al column sample with holes,the projecting data of 36 multiplied 552 groups are collected.After and before the data are processed,the tomography image is gotten by the filter anti-projection,and the tomography image reveals the basic structure of the sample and it approves that it is feasible that thermal neutron tomography is developed by the uses of the thermal neutron radiography facility in No.300 reactor and it is ready for future work.