[en] The highly explored and studied southern Zhuguang granitic composite was used as the case for preliminary study on the application prospect of zircon uranium content in the exploration of granite uranium deposit. For this purpose, 21 samples of 3 types lithology from 10 U-deposit hosting pluton, 3 U-barren pluton was collected for the measurement of uranium content in zircons. Statistics of average uranium content in zircons showed that U-deposit bearing plutons have slightly higher zircons uranium content than that in U-barren pluton and there is no obvious difference of zircons uranium content between the deposit bearing and deposit barren pluton. The samples from different period and lithology in the deposit bearing pluton showed no higher average zircon uranium content than that in deposit barren plutons, the deposit bearing two-mica granite pluton of Indo-Chinese period even has less content than that in deposit barren granitic pluton of the same period. Meanwhile, the granite dikes in deposit bearing pluton have ultrahigh zircon uranium content (the average uranium content in zircons was more than 3000 × 10^-6). Therefore, the uranium content in zircons could not be used to evaluate the deposit bearing capacity in Zhuguang granitic composite, the high zircons uranium content in granite dike maybe the result of metallization and can be used as the sign for the indication of uranium deposits in this area. (authors)