Abstract: The temporal and spatial distribution of the pollen cones and seed in Taxus yunnanensis was explored,and the results are as follow:there is no obvious variation of the relative density of seed and pollen cones in all directions horizontally;but the variation at the different layers of the trees is significant:from top to base,the relative density of pollen cones declined,and the relative density of seeds is highest in the middle level,and lowest at the base;the variation in the outputs of the seeds and pollen cones between years is significant:the seeds production in2006 was negatively related to that in 2007 with R=-0.46;the pollen cones production in2006 was positively related to that in2007 with R=0.86;the seeds production was negatively related to the production of new twigs with R=-0.47,and was negatively related to the length of longest new twigs with R=-0.29.Based on these results,the authors considered that sun light might be one of the primary factors that affected the seeds and pollen cones' distribution;climate might affect the seeds and pollen cones' production;as it was observed in any individuals that the seeds' production was affected by the seeds' production of the last year;the pollen cones' production might be decided by the its genetic characters.