The invention discloses a distribution network loop closing risk analysis method based on province and region and deploying integration. Loop closing operation analysis in a region or in a trans-regional range is realized by combination with a full-province model or an external network equivalent model; parameters of accurate length, type and the like of a loop closing feeder line are obtained from a distribution network system online; relay protection fixed value information of the loop closing feeder line is obtained online from a relay protection online monitoring and analyzing system; power grid steady-state power flow in a loop closing operating way and power flow distribution of a main network and the loop closing feeder line in an N-1 condition are calculated to obtain a ground state in the loop closing operating way and equipment out-of-limit information in the N-1 condition; and the analysis method is high in applicability and precision and capable of satisfying power grid safety and stability guiding rule-based loop closing risk analysis.