The structure model(AB)mAGA(BA)m of photonic crystal with metallic silver defects is constructed and the enhancement effect of metallic silver defects on the light absorption characteristics of photonic crystals is studied by means of computer calculation simulations using the theory of transmission matrix method.It is found that when the metallic silver defects are introduced into the photonic crystal,the optical reflectivity and absorption of the photonic crystal are enhanced.In the range of 400～1400 nm,the average reflectivity is increased to 93.87%,and the average absorption rate is increased to 6.13%,and the magnitude and position of the absorption is adjusted.With the increase of the period number m or the thickness dB,the optical absorption rate of the photonic crystal is enhanced.When m=5,the absorption rate is up to 98.72%,and when dB=118.52 nm,the absorption rate is up to 99.59%.The position of the absorption peak moves to the short wave direction with the increase of m,but moves to the long wave direction with the increase of dB.With the increase of the incident angle θ,the light absorption of the photonic crystal increases to the maximum value first and then decreases gradually,and the position of the absorption peak moves to the short wave direction with the increase of the incident angle θ.As the thickness of A medium layer dA increases,the optical absorption rate of photonic crystal weakens.When dA =73.22nm,the absorption rate is 98.72%,and the position of absorption peak moves to the direction of long wave with the increase of dA.The light absorption characteristics of photonic crystals with metallic silver defects can provide theoretical references for the research and selection of new optical absorbers,solar cells,filters and total reflectors.