Abstract: Grassland investigation is an important part of natural resources investigation,the investigation results play an important role in grassland resource management.For a long time,there is conflicts between the land investigation result grassland data and forestry investigation result grassland data.This paper analyzes the difference of classification standards and investigation grassland data in land,grassland,forest departments.In combination with Yangshuo’s third national land investigation and unified investigation and monitoring of natural resources,the cohesive approach to grassland data has been discussed under the work classification of the third land investigation.Finally,some suggestions about grassland investigation in the new period are put forward,hoping to promote the integration of forest investigation and grassland investigation and the construction of unified investigation and monitoring system of natural resources.

Key words: land investigation grassland data;forestry investigation grassland data;difference analysis;convergence exploration;Yangshuo county