DC line fault recovery improves reliability of DC system.However，impacts on frequency and voltage of weak receiving systems are serious.This paper studies DC line fault recovery schemes of weak receiving systems.The operation sequence of a typical DC line fault recovery is firstly introduced，and impacts of DC line fault recovery on the second and third defensive line of power systems are analyzed.It is indicated that DC line fault recovery and low-frequency load shedding may lead to cascading faults without well coordination.Then，principles for the coordination are put forward，and a assessment of schemes for DC line fault recovery and its flow chart are proposed.Candidate schemes of DC line fault recovery are analyzed，and regulations of system operation are suggested.Finally，schemes for DC line fault recovery of a weak receiving system are studied，and operation suggestions are given.Simulation results demonstrate the effectiveness of the proposed criteria and methods.