The invention relates to a hybrid DC power transmission receiving end weak power grid frequency cooperation control method. According to the method, a hybrid DC power transmission system sending end is a 12-pulse current source transverter, and a constant DC current control mode is employed; a receiving end is an MMC transverter, a constant DC voltage and constant AC voltage control mode is employed; for receiving end weak power grid frequency fluctuation caused by instantaneous load jump or small load fluctuation, a sub module capacitance voltage is adjusted to simulate inertia of a synchronous generator to alleviate receiving end weak power grid frequency fluctuation, and frequency supporting is realized; when frequency offset caused load switching surpasses a system permission scope, active power outputted by the sending end is adjusted according to a frequency-current characteristic curve to cooperate the virtual inertia simulated through the sub module capacitance voltage of the receiving end to commonly adjust frequency of a receiving end system. According to the method, the hybrid DC power transmission system is utilized to realize rapid, efficient and cooperative adjustment on receiving end weak power grid frequency, and dependence of instantaneous load fluctuation on inter-station communication and the sending end transverter adjustment effect is reduced.