The invention discloses a color printing machine spray nozzle installing structure facilitating position adjusting. An adjusting box is included; a plurality of supporting legs are arranged on the lower side wall of the adjusting box; the lower ends of the supporting legs are each connected with a supporting plate; a first movable plate and two second movable plates are inserted in the upper sidewall of the adjusting box; the inner walls of the two sides of the adjusting box are each provided with a fixed block; a first screw lead and a second screw lead are inserted in the sides, away from the inner walls of the two sides of the adjusting box, of the two fixed blocks; and a rotating rod is connected between the first screw lead and the second screw lead. According to the color printing machine spray nozzle installing structure facilitating position adjusting, a first ball nut is used for driving two sliding blocks to move towards the inner side, the first movable plate is pushed outby a pushing rod, and the height of a spray nozzle can be conveniently adjusted; a second ball nut is used for driving a movable block to move left and right, the left-right position of the spray nozzle is adjusted, positioning is accurate, and adjusting is convenient; and by means of two arc-shaped rings, a spring and a threaded rod, fixing of the spray nozzle is achieved, installing and disassembling are convenient, and the color printing machine spray nozzle installing structure facilitating position adjusting is simple in structure, convenient and practical.