With the rapid development of new energy, transmission equipment (220/330 kV, 500 kV and above) maintenance scheduling needs to ensure the capability of renewable energy transmission. A new scheduling method is proposed, and its principle is as following:equivalent load probability density function and daily minimum generation are utilized to acquire wind power curtailment quantity as one of the optimization objectives; considering the solar and hydro characteristics respectively, the appropriate renewable energy transmission equipment maintenance periods are proposed. Taking into account the tie-line section security, an integrative maintenance scheduling model is established and mixed-integer programming method is utilized to solve this problem. The validity and rationality of the method is proved by the yearly maintenance scheduling of actual power grid.