NOVELTY - Electrode paste for silicon solar battery comprises sunward-side grid silver paste, back-surface silver-aluminum paste and back-surface aluminum paste.    USE - The electrode paste is useful for silicon solar battery (claimed).    DETAILED DESCRIPTION - Electrode paste for silicon solar battery comprises sunward-side grid silver paste, back-surface silver-aluminum paste and back-surface aluminum paste, where (a) the composition of the sunward-side grid silver paste is as follows (according to weight percents): 70-90% of silver powder, 0.01-1.0% of elementary stibium powder, 1.0-5.0% of silicon alloy powder, 10-20% of modified organic adhesive, 1-10% of inorganic adhesive; the total amount of the components is 100%; (b) the composition of the back-surface silver-aluminum paste is as follows (according to weight percents): 70-90% of silver powder, 1.0-5.0% of elementary aluminum powder, 0.1-5.0% of silicon alloy powder, 10-20% of modified organic adhesive, 1-10% of inorganic adhesive; the total amount of the components is 100%; and (c) the composition of the back-surface aluminum paste is as follows (according to weight percents): 40-70% of aluminum powder, 0.01-5.0% of elementary indium powder,20 to 30% of modified organic adhesive, 0.1-15% of inorganic adhesive; the total amount of the components is 100%; the marketing purity of the silver powder is equal to or larger than 99.95%, and the average grain diameter is 0.1-0.5 nu m; the marketing purity of the silicon alloy powder is equal to or larger than 99.95%, and the average grain diameter is 5 mu m; the marketing purity of the simple-substance element powder is equal to or larger than 99.95%, and the average grain diameter is 3-5 mu m; the simple-substance element is boron (B), aluminum (Al), gallium (Ga), indium (In), antimony (Sb), nickel (Ni), germanium (Ge), phosphorus (P), tin (Sn), lithium (Li), copper (Cu), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), gold (Au), manganese (Mn), zinc (Zn), titanium (Ti), palladium (Pd), and platinum (Pt); the silicon alloy powder is the alloy powder (MSi) of simple-substance element (M) and base element silicon, the Si content of the silicon alloy powder is 0.01-40%, and the residual amount is simple-substance elements. An INDEPENDENT CLAIM is a method for preparing the electrode paste for silicon solar battery comprising: (a) preparation method of sunward-side grid silver paste: weighing and uniformly mixing the components according to the composition, rolling the mixture with a three-roller rolling middle till the fineness is 2.0-5.0 mu m and the viscosity is 90 to 110 thousands mpa.second to obtain the sunward-side grid silver paste product; (b) preparation method of back-surface silver-aluminum paste: weighing and uniformly mixing the components according to the composition, rolling the mixture with a three-roller rolling middle till the fineness is equal to or smaller than 10.0 mu m and the viscosity is 90 to 110 thousands mpa.second to obtain the back-surface silver-aluminum paste product; and (c) preparation method of back-surface aluminum paste: weighing and uniformly mixing the components according to the composition, rolling the mixture with a three-roller rolling middle till the fineness is 20.0 to 25.0 mu m and the viscosity is 20000-40000 MPa.second to obtain the back-surface aluminum paste product.