The utility model discloses a ripple steel sheet initial stage supporting construction suitable for step method excavation, it is strutted buckled plate, side wall buckled plate and inverted arch buckled plate montage cyclization and is constituted by upper portion, top bar and two encircle two intrinsic H shaped steel at the feet department in the hole room, upper portion is strutted the upper end of buckled plate and side wall buckled plate and is supported fixedly through H shaped steel, the two intrinsic channel-section steels at the two hunch foot departments of getting out of a predicament or an embarrassing situation, the lower extreme of side wall buckled plate is supported by the channel-section steel to be fixed, and the lower tip of side wall buckled plate is reserved has the inverted arch lap joint, upper portion is strutted buckled plate, side wall buckled plate and inverted arch buckled plate and loop through flange joint on vertical, irrigation concrete between buckled plate, side wall buckled plate and inverted arch buckled plate and the country rock is strutted on upper portion. The utility model discloses a structure that ripple steel sheet and concrete mix is made, can with the balanced atress of country rock, guaranteed the intensity of preliminary bracing to have the construction of doing benefit to, the cycle is short, and is efficient, stability is strong, advantages such as low cost.