The major elements,trace elements,REE elements on the felsic volcanic rocks of late Mesozoic in the north of Xiazhuang uranium ore field were tested and analyzed,a conclusion was drew: the Mesozoic felsic volcanic rocks consisted of porphyroclastic lava of cale-alkaline rock series in the north of Xiazhuang uranium ore field;the Mesozoic felsic volcanic rocks experienced different separate crystallization or the plagioclase rudimental ratios is different during partial melt in the north of Xiazhuang uranium ore field,the substance of the felsic volcanic rocks was from the upper earth crust,and it maybe a production of partial melting of metamorphic sedimentary rocks under lower temperature and higher water fugacity condition.