The invention discloses a deep sea full-section observing turbulent mixing section plotter which comprises an instrument bin and a probe bin. The instrument bin and the probe bin adopt the split design, a flexible damping coupling frame is connected between the instrument bin and the probe bin, the flexible damping coupling frame comprises a plurality of supporting rods, one ends of all supportingrods are connected to a fixing ring, the fixing ring and the instrument bin are connected, the other ends of all the supporting rods are connected to a probe protecting ring, all the supporting rodsform a protecting space, the probe bin is arranged inside the protecting space, and electric devices between the probe bin and the instrument bin are connected through a watertight cable; a pluralityof weights are arranged on the flexible damping coupling frame, a floating body material block is arranged outside the instrument bin, and all the weights and the floating body material block are allcontrolled by a load rejection mechanism to be released. By freely adjusting the observation position of the probe bin, direct observation of the full section from the sea interface to the seabed boundary layer is achieved; meanwhile, the two bins are flexibly connected, and the interference caused by self-vibration can be lowered.