To provide a field spray slope frame construction method capable of improving an appearance by forming a slope whose whole surface has been greened just after construction by hiding a slope frame as an unnatural structure, and making it unnecessary to perform the molding process of a sprayed surface resulting in the deterioration of quality or the deterioration of strength such as the peeling of a cement-based solidification material, and safely and inexpensively performing a slope protection work in a simple process.

A field spray slope frame construction method includes: a slope frame formation form material installation process of installing a form material 1 whose upper end 1a is open on a slope 80; a slope frame formation process of installing a cement-based solidification material 2 by leaving the vicinity of an upper part in the form material 1 installed on the slope 80 to form a slope frame 3 in the shape of parallel cross; a first vegetation base material layer formation process of spraying a vegetation base material to the vicinity of the upper part in the form material 1 installed on the slope 80 to form a first vegetation base material layer 4; and a second vegetation base material layer formation process of spraying the vegetation base material to a site surrounded by the slope frame 3 to form a second vegetation base material layer 5.