Abstract: The existence of the lacking region in the Doppler weather radar velocity field is one of the most important factors impacting the accuracy of the velocity products.Under the assumption of the actual wind field in the linear distribution,application of the actual Doppler velocity field data,a test is processed by filling the lacking area artificially created in types of random discontinuous cumulative 10180 of the missing gap and continuous cumulative gap of lacking 10180 by using the VAD technique and the iterative filling method.The analysis shows that the iterative method is suitable for the continuous cumulative gap in 160 for relatively complete Doppler velocity field,In the range of 160,the average absolute error is in about 3 m/s compared with the original data.The iterative method is suitable for the continuous cumulative gap in 100 for the Doppler velocity field existing more lacking region because of the blocking angle or no-echo itself.The average absolute error is in about 3m/s compared with the original data.The average number of iterative filling method can meet the actual needs.In the condition of random discontinuous cumulative gap in 180,even though the actual Doppler velocity field exists more no-echo region itself,the Iterative filling precision have no significant correlation with the gap.The average absolute error is in about 3m/s compared with the original data,and less number of iterative filling method can meet actual business needs.