The invention discloses a method for estimating resistance parameters of a circuit. The estimation on resistance parameters of the circuit is circularly calculated according to periods. One calculation comprises the following steps S1. acquiring real-time remotely measured data including active power P1 and P2, reactive power Q1 and Q2, voltages V1 and V2 at two sides the circuit; S2. calculating an estimated value of a present resistance parameter; S3. storing the estimated value of the present resistance parameter; and S4. calculating the median of the stored estimated values of resistance parameters as an output result. The method for estimating resistance parameters of the circuit has no problem with value stability, and is simple, convenient to implement, and good in practicality at the same time.