The invention discloses a slope surface protection supporting structure of a high and steep soil slope and a construction method of the slope surface protection supporting structure, and relates to the field of slope supporting. S2, a traditional slope supporting structure is constructed, and the stability is detected; s3, digging a planting pit and carrying out wall protection treatment; s4, a
root system control cage body is installed and fixed; s5, seedlings are planted and cultivated in the
root system control cage body, and lateral roots extend into the soft soil
body area in a directional mode; s6, the plants and the
root system control cage are removed, and root
system holes are protected; s7, a grouting anchoring
assembly is arranged; s8, performing
pressure grouting construction; s9, maintaining the grouting body and detecting the stability of the side slope; and S10, the planting pits are sealed and filled, and slope ending is completed. The problems that according to a traditional grouting technology,
grout is difficult to permeate into a soft area in a soil body, and gaps are prone to being generated on the combination face of the
grout and the soil body are solved, the grouting body can deeply permeate and be tightly combined with the soil body, and the overall construction technology gives consideration to the short-term ecological soil fixation requirement and the long-term
engineering stability requirement.