The paper introduces the English version of Physician Data Query(PDQ) provided by U.S. National Cancer Institute and study, technologies, processes, etc. of the building of relevant bilingual parallel corpus at home and abroad. By studying the structure of source data, it conducts data analysis and processing, designs alignment of bilingual corpus, and explicates ways to build bilingual parallel corpus of cancer in English and Chinese. It discusses relevant design mechanisms and the quality of the corpus.