The invention relates to a territorial
space optimization method for cross-scale planning target and ecological
toughness feedback, and the method comprises the steps: firstly carrying out the long-time-sequence territorial space function classification through a
random forest algorithm based on a
big data platform GEE, and analyzing a driving
force factor; planning texts of multiple administrative levels are collected, a planning target is analyzed, a target parameter group is obtained by utilizing an equal
interval method, and a future territorial space structure is modeled and simulated in combination with a'double evaluation 'result. On the basis, the
vegetation structure is analyzed, and long-time-sequence
toughness indexes of global and local grids are simulated based on the biophysical process. And finally, analyzing the change trend of all the
toughness indexes, if trend change exists, feeding back and iterating the parameters until all the toughness indexes are kept stable or tend to a good trend, and ending circulation and outputting. According to the method, the feedback relationship between planning targets of different levels and the
ecosystem toughness is quantified for the first time, effective integration of
sustainability and toughness is successfully realized, and the scientificity of territorial space structure optimization and space decision is improved.