The invention belongs to the technical field of irrigation, and relates to a cored micro pipe irrigation system for greenhouse climbing crops. The system mainly comprises a main water source inlet pipe, a main water source valve, a filter, an electromagnetic valve, a main pipe, hoses, switchover joints, a branch pipe support frame, branch pipes, stress meters, cored micro pipe irrigators, soil moisture sensors and a controller. According to the system, each cored micro pipe is used as an irrigator for delivering water from each branch pipe to the roots of crops; the irrigation water from a water source is filtered by the filter, flows to the main pipe and each branch pipe and enters each cored micro pipe irrigator from the water outlet of each branch pipe; the water entering each cored micro pipe is uniformly delivered to irrigate the crops under the coaction of gravity, capillary force and siphon force of a core layer; under the control of the controller, intelligent automatic irrigation is realized in the whole crop growth period; and for the climbing crops, climbing ropes are substituted by the cored micro pipes, so the climbing ropes are not required to be built any more. The system is suitable for water-saving irrigation of the greenhouse climbing crops.