The invention relates to a direct-driven wind power subsynchronous oscillation analysis method based on network side control loop time delay. The method comprises steps that step 1, in a network side control loop, Uabc, Iabc and Udc required for inverter control are acquired through resistor voltage division and resistor sampling links, the specific consumption time of the link is calculated; step 2, the Uabc, Iabc and Udc are filtered to acquire an effective control signal, and group time delay of the link is calculated; step 3, the control signal acquired in the step 2 is converted into a corresponding digital signal to realize network side control, the specific consumption time of the link is calculated; step 4, the control signal after analog-to-digital conversion is inputted to the network side control loop, a control period of a CPU between input to the network side control loop and output of the network side control loop is calculated; and step 5, specific time delay required by different measurement links is calculated respectively according to the time delay required by the four previous steps. The method is advantaged in that a subsynchronous oscillation phenomenon generation mechanism can be analyzed.