Sampling box body for geotechnical investigation

The utility model relates to a geotechnical investigation sampling box, and relates to the technical field of offshore exploration, the geotechnical investigation sampling box comprises a transmission box body and a discharging frame arranged in the transmission box body, a shell is horizontally installed on the transmission box body, a discharging inner cavity wrapping the discharging frame is formed in the shell, a sliding rail is formed on the discharging frame, and the sliding rail is provided with a sliding groove; a clamping plate is movably arranged on the sliding rail, a transmission plate is arranged at the bottom, facing the transmission box body, of the clamping plate, a transmission mechanism for driving the transmission plate is arranged on the transmission box body, and a driving part for driving the transmission mechanism to conduct transmission is arranged at the bottom of the transmission box body. A worker places the collected soil on a discharging frame, then inserts a shell, opens a drivin