The invention relates to hydraulic fill curing agent mixing equipment, which is installed and connected at a position close to the outlet of the end section of a hydraulic fill delivery pipe. The hydraulic fill curing agent mixing equipment is characterized in that the main body of the hydraulic fill curing agent mixing equipment is a section of rifle delivery pipe. The size of the rifle delivery pipe is consistent with the size of the dredged sludge delivery pipe. The rifle delivery pipe is connected in the hydraulic fill delivery pipe. The middle part of the hydraulic fill curing agent mixing equipment is connected with a curing agent chamber through a curing agent delivery pipe. The other end of the curing agent delivery pipe is connected with the rifle delivery pipe from the side surface. By using a rifle technology, hydraulic fill is enabled to rotate and form a mixed flow, curing agent is automatically sucked in through the delivery pipe by using negative pressure formed close to a pipe wall due to the rotation of a water flow and then the curing agent is fully mixed with the fill. An equipment guarantee is provided for the large-scale engineering application of the curing agent. The problem in large-scale hydraulic filling and reclamation is solved.