The invention discloses a voltage control method of a 330kV wind farm collection substation. The voltage control method of the 330kV wind farm collection substation comprises the following steps: a wind farm collection station is controlled to make a voltage out-of-limit judgment, a control strategy is started when voltage is out of limit, and the control is immediately ended when a set range is satisfied; a subordinate actuating station conducts longitudinal regulation; a 330kV wind farm collection station or substation is coordinately controlled to conduct transverse regulation to complete the control. On the premise that a power grid is guaranteed to run safely and economically, the capacity of accepting and delivering new energy of the power grid is realized, the wind curtailment is reduced, and the goal of improving the on-grid energy of the new energy is achieved.