Blow-filling injection system

The invention relates to a blow-filling injection system. The blow-filling injection system comprises a mud discharge tube and a spray head which is arranged at a discharge end of the mud discharge tube, and further comprises a spray head guide device, wherein a spray head is fixedly arranged on the guide device; the guide device can drive the spray head to move to form an arc-shaped silt pile, sothat an injection area is greatly increased, operation time of an earth remover is reduced, and working efficiency is improved; the spray head comprises a spray head body which is in the shape of a cone; the diameter of a nozzle of the spray head body is smaller than that of an inlet; the rear end of the spray head body is equipped with a guide mechanism; the guide mechanism comprises a guide ring, a ring-shaped gas cavity and a plurality of gas-flow holes which are uniformly distributed in an annular mode; the guide ring is detachably arranged on the inner wall of the rear end of the spray head body; the guide ring