[en] A special drug carrying hydrogel base wound dressing by radiation preparation is developed for hospital use. The dressing possesses high water absorption property. Radiation preparation is carried out using a Van de Graaff Accelerator as an electron radiation source. The effect of absorbed dose and amount of crosslinking agent on the gel fraction and swelling ratio of the hydrogel were determined respectively. As a bio-medical material, standard tests were made. Results showed properties conforming with requirements for clinical applications. Results obtained from clinical tests were good. (author)