Abstract: The sampling frame design and cluster sampling design of national forest resources macro-monitoring in China were expounded at first.In view of two interpretation ways,that is,department interpretation and cluster interpretation,some sampling estimation methods were presented,such as systematic sampling,cluster sampling and two-stage sampling,of which cluster sampling was more suitable to department interpretation and two-stage sampling was more suitable to cluster interpretation.From the comparison of sampling estimation results for 9 provinces,it was concluded that cluster sampling for unequal cluster size was suitable to both department interpretation and cluster interpretation.

Key words: forest resources macro-monitoring, sampling frame, cluster sampling, two-stage sampling