NOVELTY - A gel type polyelectrolyte contains electrolyte solution comprising solvent and lithium salt infiltrated into a polymer matrix. The polymer matrix has a hybrid polymer structure which is formed by copolymerization of monomer (A) having 3-8 functional groups at the terminal and linear hydrophobic monomer (B) having two functional groups at the terminal.    USE - Gel type polyelectrolyte used for secondary lithium battery (claimed) used in mobile communication apparatus, digital camera, etc.    ADVANTAGE - The gel type polyelectrolyte has improved mobility of ions, and provides secondary lithium battery having excellent adhesion between the electrode and separator, improved lifetime, and excellent charge and discharge characteristics and durability.    DETAILED DESCRIPTION - A gel type polyelectrolyte contains electrolyte solution comprising solvent and lithium salt infiltrated into a polymer matrix. The polymer matrix has a hybrid polymer structure which is formed by copolymerization of monomer (A) having 3-8 functional groups at the terminal and linear hydrophobic monomer (B) having two functional groups at the terminal. The monomer (A) and monomer (B) are mixed in the weight ratio of 95:5-50:50. The functional groups of monomer (A) and monomer (B) are unsaturated hydrocarbon. The central element of repeating unit of monomer (B) is carbon or silicon. The solvent used is carbonate type solvent, ester solvent, ether-based solvent and/or ketone based solvent. The lithium salt is lithium hexafluorophosphate, lithium chlorate, lithium hexafluoroarsenate, lithium tetrafluoroborate, lithium perfluorosulfonimide, lithium bis(pentafluoroethane sulfonamide), lithium pentafluoroethane sulfonyl amide, lithium fluoroantimonate, lithium trifluoromethane sulfonate, lithium aluminate, lithium aluminum tetrachloride, lithium chloride, lithium iodide and/or lithium sulfonate of formula: (CxF2x+1SO2)(CyF2y+1SO2), where x and y are natural numbers. The anode of secondary lithium battery contains active materials chosen from lithium manganese compound of formulae: (LixMn1-yM'yA2), (LixMn2O4-zXz), and (LixMn2-yMyM'zA4), lithium cobalt compound of formulae: (LixCo1-yMyA2), (LixCo1-yMyO2-zXz), (LixNi1-yMyO-zXz), (LixNi1-yCoyO2-zXz), (LixNi1-y-zCoyMzAa), (LixNi1-y-zCoyMzO2-aXa), (LixNi1-y-zMnyMzAa) and (LixNi1-y-zMnyMzO2-aXa), where x is 0.9-1.1, y is 0-0.5, z is 0-0.5, a is 0-2, M and M' are magnesium, aluminum, cobalt, potassium, sodium, calcium, silicon, titanium, tin, vanadium, germanium, gallium, boron, arsenic, zirconium, manganese, chromium, iron, strontium and/or rare earth elements, A is oxygen, fluorine, phosphorus and/or sulfur and X is fluorine, sulfur and/or phosphorus. The active materials are coated on metal which is crystalline carbon, amorphous carbon, carbon complex, carbon fiber, lithium metal, lithium alloy and/or lithium composite.