Based on five indices,the climatic character of North Africa subtropical high is analyzed.The analysis results show that the stronger the North Africa subtropical high,the wider its range;the farther the eastward extension of the high,the lower the latitude of its ridge line.The North Africa subtropical high shows distinct seasonal changes in its intensity and location,with two obvious northward jumps in late May and late June,about two to three pentads earlier than the West Pacific subtropical high.The influence of North Africa subtropical high on the summer precipitation of China is reflected in the out of phase distribution of precipitation in the south and north parts of eastern China,and in the east and west parts of the Tibetan Plateau.At last,the relationship of North Africa subtropical high with the West Pacific subtropical high and the East Asian atmospheric circulation is discussed,and it is found that the variation trends in intensity,range and location of the two highs are basically identical,displaying a distributive character of positive negative positive wavetrain over western Asian to the eastern Pacific ocean.This zonal teleconnection of wavetrain form over the Asian region might be one of causes for the temporal/spatial inhomogeneity of summer precipitation over China.