The invention discloses a degradable photoelectric material and a preparing method for the degradable photoelectric material. The degradable photoelectric material comprises, by mass, 10 parts to 20 parts of manganese phthalocyanine, 8 parts to 15 parts of silicon dioxide, 1 part to 6 parts of dimethyl sulfoxide, 2 parts to 8 parts of polyaniline, 20 parts to 40 parts of polylactic acid, 1 part to 8 parts of zinc stearate, 2 parts to 8 parts of vinylcarbazole, 5 parts to 15 parts of PTC, 1.2 parts to 3.7 parts of methylamine, 0.18 part to 1.25 parts of light stabilizers and 1.8 parts to 3.5 parts of ultraviolet absorbents, and further comprises, by mass, 0.31 part to 1.92 parts of N,N'-dimethyl-3,4,9,10-perylenetetracarboxylic diimide. The degradable photoelectric material has the dual-conduction performance and is small in toxicity, small in environment pollution, degradable, high in photoelectric conversion efficiency, light in weight, simple and practicable in preparing method and low in production cost.