Abstract: Various kinds of agricultural natural disaster occurred frequently in Zhou, Qin, Western and Eastern Han dynasties. Through dealing with natural disaster historical data, the result shows that the important agricultural natural disaster frequency was 8 times in Western Zhou epoch, 88 times in Eastern Zhou epoch and averaged 1 time every 6.2 years; 291 times in Qin and Han epoch and averaged 1 time every 1.5 years. Agricultural natural disaster showed obvious character in time distributing: ①agricultural natural disaster was not evenly distributed through a year, natural disaster taking place more times in summer and autumn than spring and winter. ②Natural disaster had many concentratedly freqent occurring periods in interannual distribution. There was 1 period in Western Zhou Dynasty, 9 periods in Eastern Zhou Dynasty, 20 periods in Qin and Western Han dynasties, 27 periods in Eastern Han Dynasty. Furthermore, the more late the time was, the more obvious the phenomena of agricultural natural disaster muster occurrence were. In the aspect of space distribution, the sum of various kinds of agricultural natural disaster was 131 times in Shandong disaster section, 113 times in Shanxi disaster section, 15 times in Jiangnan disaster section, 6 times in Northwest disaster section, 4 times in Sichuan disaster section. The heavy disaster areas were Shandong and Shanxi sections in Zhou, Qin, Western and Eastern Han dynasties.