Sonic drilling coring is a relatively new exploration technique for drilling and sampling application in the fields of soil environmental and geo-technical exploration. It uses high frequency vibrations (50~200 Hz) generated by 2 symmetrical rollers in the sonic head (oscillator) to vibrate drill pipe or outer casing for drilling. The rollers’ vibration is synchronized to ensure that the vibration is transmitted vertically down the drill string to the bit. The paper introduced TGSD-50 sonic drilling coring rig about the structure design, main technical parameters and the features.