In the state estimation based on hybrid measurement of the phasor measuring unit（PMU）and supervisory control and data acquisition（SCADA），once the PMU voltage phase angle measurement results on the reference bus are found to be bad data，the introduction of all the remaining phase angle measurements will be affected and the overall calculation of active parameters will be corrupted，which will seriously influence the accuracy of calculation.This paper proposes a new method to solve the bad data problem of phase angle reference bus based on the calculation model of state estimation with hybrid measurement.By changing the conventional method of taking the reference buss state parameter as a definite value and ridding it from the iterative calculation，the proposed method adds a corresponding column of reference buss state parameter and a corresponding row of PMU measurement in the Jacobi matrix generated.The reference buss state parameters are employed in the iterative calculation as other buses.Then bad PMU measurements of reference bus can be detected，identified and removed from the state estimation measurement system so as to thoroughly eliminate its impact on the calculation results.Finally，the effectiveness of the method proposed is verified with an actual power grid example.