Based on the groundbased 3D lightning detection network (3D LDN) data in Dalian and Qingdao areas, the detection efficiency of FY-4A lightning mapping imager (LMI) in the Yellow sea and Bohai sea area was evaluated. It was found that from the four severe convective weather processes in Dalian area in 2019, most of the lightning pulses occurred within radar echoes intensity greater than 30 dBZ, and the corresponding cloud top height was about 9 km, the number of groups detected by FY4A LMI was fewer than that of the pulses presented by groundbased 3D LDN, the average ratio was 0.2, ranging from 0.15 to 0.26. From the five severe convective weather processes in Qingdao area in 2019, the number of groups detected by FY4A LMI was also fewer than that of the pulses presented by groundbased 3D LDN, the average ratio was 0.34, ranging from 0.27 to 0.4. Generally, the lightning pulses location detected by FY-4A LMI was consistent with the lightning pulses presented by groundbased 3D LDN in Qingdao area, which located in strong echo area. However, the detection efficiency of FY4A LMI in the Yellow Sea and Bohai Sea area was lower.