In order to make the best use of wind power and improve the economy and reliability of distributed wind generation (DWG) in the distribution network planning, a coordinated planning of tie lines and DWG is developed. First, by analyzing the influence of different locations of DWGs and the tie lines on the power distribution reliability, the contingency load loss index (CLLI) algorithm is proposed. On this basis, a multi-objective planning model is developed with a minimum DWG and tie line cost and network loss as well as the optimal reliability. The non-dominated sorting genetic algorithm is used to get the location and capacity of DWG and the location of tie lines. IEEE 33-bus system shows that the method proposed is reliable and effective in the determination of the location and capacity of DWG and the location of tie lines.