A method of implanting fiber Bragg grating （FBG） sensors into composite pressure vessels with carbon fiber reinforced aluminum alloy inner liners was proposed to accomplish strain measurement of the vessels. FBG sensors were firstly bonded on sandblasted liner outer surface at room temperature. The liner was then aged at high temperature. The carbon fiber was wound and cured at last. Experiments were conducted by implanting 8 FBG strain sensors into a composite pressure vessel. 6 out of the 8 sensors survived after the vessel cured at 150 ℃/1.5 h. Strain measurement of the vessel during winding， curing， hydraulic fatigue and high temperature experiment were recorded. The results show that the proposed method can reduce the FBG sensors'' intensity attenuation due to liner surface roughness， and the feasibility of implanteing FBG sensors into composite pressure vessels for strain testing is verified.