The invention discloses a method for analyzing loop closing risks based on an interconnection switch in a power distribution network. The method comprises the steps that firstly, the voltage difference of the two sides of the interconnection switch is acquired, a power transmission network CIM model and a power distribution network CIM are spliced to form a loop closing path, and the loop impedance of the loop closing path is calculated; secondly, the loop closing steady-state current and the maximum impact current are worked out according to the voltage difference of the two sides of the interconnection loop and the loop impedance of the loop closing path; lastly, safety verifying is carried out on all devices on the loop through the loop closing impact current and the loop closing steady-state current, and whether loop closing can be carried out or not is judged. The method does not depend on the telemeasuring data of the power transmission network, the computing time is short, the computing result accuracy is high, the convergence problem does not exist, the change of the power transmission network can be followed in real time, the power transmission network loop closing risks under the most situations can be solved, the power outage caused by the loop closing failure is avoided, and the high social benefits and economic benefits are achieved.