The invention discloses an alternating current/direct current system voltage reactive power coordinated control method considering the loss characteristics of converter stations. The method includes the following steps that: the active output power of each generator set and the active power transmission power of each transmission line in a whole network are obtained; the active power loss minimization objective function model of the whole network is established, and the active power loss of the whole network includes network loss corresponding to an alternating current/direct current system power flow calculation model and the total active power loss of the converter stations of the whole network; the voltage reactive power coordinated control measures of the converter stations, which satisfy the active power loss minimization of the whole network, are obtained, wherein the control measures contain the adjustment amounts of the operating parameter values of the converter stations; the adjustment amounts of the voltage reactive power coordinated control measures of the converter stations are issued to the corresponding converter stations, so that the converter stations can execute the measures. With the method of the invention adopted, the total loss of the network of an entire alternating current/direct current transmission system can be minimum; and coordinated optimization ability of each loop of ultra/extra high-voltage direct-current voltage reactive power control can be give to full play, the actual running loss of each converter station can be reduced, and the economical efficiency of the voltage reactive power control measures of a multi-loop high-voltage direct-current transmission system can be improved.