The invention provides a water-coupled rock core acoustic parameter testing platform which comprises a clamp base, a rock core pipe, a clamping mechanism, a locking mechanism and a transducer. The clamping mechanism comprises the locking mechanism and two symmetric holders. A rock core pipe is held by the two holders, and the locking mechanism is connected with the two holders and locks the holders. Transducer mounting holes are formed in the side walls of the holders and used for allowing the transducer to be mounted. Vertically through water cavities are formed in the holders, and the watercavities are communicated with the transducer mounting holes. Transducer seals are arranged between the transducer and the water cavities, and a holder axial seal and a holder radial seal are arrangedbetween the rock core pipe and the water cavities, and it is guaranteed that the water cavities are sealed. By means of universal design, the size is small, the occupied space is small, operation isconvenient, and the coupling performance of the rock core pipe and the transducer is greatly improved. The acoustic transducer can be clamped to measure a rock core, and the water-coupled rock core acoustic parameter testing platform can cooperate with other testing platforms according to needs to carry out acoustic parameter testing.