The present invention relates to a compaction grouting system capable of increasing the injection efficiency of a mortar injection material and reducing construction time by reinforcing the ground by simultaneously injecting the mortar injection material into a plurality of bore holes formed in the ground. The compaction grouting system of the present invention includes: a simultaneous injection pump pumping a mortar injection material; a plurality of injection hoses connected to the simultaneous injection pump so that the mortar injection material from the simultaneous injection pump can flow therein; and a casing coupled to the end part of the injection hose and inserted into the ground. The simultaneous injection pump includes: a hopper into which the mortar injection material is injected; a delivery unit which has a first delivery cylinder and a second delivery cylinder repeating to suck and discharge the mortar injection material to an opening part on the front surface by allowing an inner piston to alternatively reciprocate; a discharging unit which has a first outlet and a second outlet formed in a location corresponding to the first and second delivery cylinders on the front surface of the hopper and having the injection hoses coupled thereto, respectively; and a connecting unit provided between the delivery unit and the discharging unit and alternatively connecting the first delivery cylinder with the first outlet and the second delivery cylinder with the second outlet while reciprocating between the first delivery cylinder and the first outlet and between the second delivery cylinder and the second outlet.
