An expansion planning method of active and reactive power is proposed for transmission network with large-scale wind power integration. In the method the annual chronological hourly data of wind power and load are taken into account， the minimum sum of the new lines cost， new reactive power compensation cost and the cost of remedial controls under the scenarios which cannot satisfy the security constraints are considered as a planning objective. To cope with the computing complexity when solving the problem， the original problem is decomposed into two sub-problems: investment decisions of power network equipments and the cost evaluation for remedial controls of an alternative. Comprehensive coordination between the both costs is achieved by planning objective of the original problem. Based on this， the characteristics of planning objective and the problem itself are analyzed， and the heuristic optimization algorithm is designed. It can improve the computation speed significantly. Finally the soundness of the method and the effectiveness of the algorithm are validated by case study.