Aiming at the problems of low efficiency, complicated data processing and human error interfer-ence in the manual verification of Sound Level Meter, an automatic verification system for the electrical performance of Sound Level Meter is proposed. The system taking multi serial port industrial computer as the control core, use LabVIEW actor framework and object-oriented technology, the HAL and MAL areconstructed to complete the packaging of verification process,verification index, standard instrument and equipment, and the sound level meter to be tested.Each functional module is built through the "class" torealize the automatic control of instrument,data acquisition, data analysis and processing, and original data recording in the verification of sound level meter Record and other automatic verification work. After many tests, the system works stably, and can automatically complete all the verification items of the So-und Level Meter, which is consistent with the traditional manual verification results. The verification timeis reduced to half of the original, and the frequency range of the sound level meter is 1 Hz ~ 200 kHz. Keyword：metrology;automatic verification；Sound Level Meters;Labview; Actor Framework