The invention discloses a voltage stability-based determination method and system of a direct-current receiving end simultaneous-stopping overhaul scheme. The method includes: for each candidate simultaneous-stopping overhaul scheme, calculating a value of entire-network average-voltage dropping caused by a fault of each node in a power network, and determining a risk level, which corresponds to the fault of each node, according to the value of entire-network average-voltage dropping caused by the fault of each node; respectively calculating a power-network topology entropy value of each candidate simultaneous-stopping overhaul scheme; respectively calculating a load motor proportion of a corresponding time period of each candidate simultaneous-stopping overhaul scheme; respectively calculating a comprehensive risk evaluation value of each candidate simultaneous-stopping overhaul scheme; and determining an optimal simultaneous-stopping overhaul scheme according to the comprehensive risk evaluation value of each candidate simultaneous-stopping overhaul scheme. According to the method, three parts of voltage stability analysis, the power-network topology entropy values under the overhaul schemes and the load motor proportions are combined to determine the optimal simultaneous-stopping overhaul scheme, and work efficiency and quality of overhaul scheme evaluation are improved.