[Objective] Study on the coupling of water conservancy construction

ecological construction

rocky desertification which are the trinity planning was carried out in Guizhou Province to promote the project integration between the three aspects

and to achieve the maximum benefit. [Methods] According to the system theory

the trinity as the three subsystem

evaluation index system was established using principal component analysis method

the SPSS software and the coupling degree model were used to calculate. [Results] The coupled system in the coupling of the three planning periods(2006-2010

2011-2015

2016-2020) were 0.68

0.86

0.89

respectively

indicating that the coupled system was in the run-in period before the trinity planning

and it had the good resonance coupling after the trinity planning. [Conclusion] The trinity planning can effectively break the bottleneck restriction of the development

and promote social

economic and ecological sustainable development in Guizhou Province. It is proposed to continue to strengthen the construction of the projects with these three aspects.