Resonant tank of stringed musical instrument

The utility model discloses a resonant tank of a stringed musical instrument, comprising a front panel, a rear panel, a side panel and a resonant tank frame which is provided with a sound beam. The utility model is characterized in that the middle sound beam and the lower sound beam of the lateral sound beam (2) arranged on the upper frame (1) of the resonant tank frame and/or the lateral sound beam (4) arranged on the lower frame (3) are arched sound beams. The utility model improves the sound beam structure of the resonant tank of stringed musical instruments, which makes the performance of stringed musical instruments have unique sound effects, with the characteristics of low enforcement cost and good effect. The resonant tank of the stringed musical instrument can be useful for stringed musical instruments such as the violin, the guitar and the mandolin.