A ballast liquid preparation and delivery pry block is provided with a stirrer, wherein the stirrer is mounted at the bottom of a mixing tank; a feeding tank is mounted on one side of the mixing tank; the bottom of the feeding tank is connected with one end of each feeding inline pump through a pipeline; the other end of each inline pump is connected with a feeding pipeline; the feeding pipeline is mounted at the inlet of the mixing tank; a return pipeline is mounted on the mixing tank; the other end of the return pipeline is mounted on the feeding tank; a control valve is mounted on the return pipeline; one side of the mixing tank is connected with a plurality of export centrifugal pumps through a pipeline; and the other end of each export centrifugal pump is connected with an export pipe. The adoption of the pry block realizes automatic water feeding, feeding and liquid mixing, finishes the ballast liquid preparation and delivery functions, saves man power, shortens working period, reduces construction cost, and greatly improves the work efficiency.