Abstract: A flat multiple composite film cover was designed. The film cover had weak areas with V-shaped grooves along circumference and radial direction. The weak areas were bonded with ER3600 epoxy resin, and the resin layer was enhanced with the glass fiber mat reinforced epoxy resin on it. Non-weak areas were all made up of the glass fiber mat reinforced epoxy resin. The property of the film cover was verified by finite element method and bursting test. The results show that the failure pressure of the film cover predicted by the finite element method was about 0.15 MPa, and that by test was about 0.135 MPa. The simulation and test results are close. The film cover broke up into four parts along the weak areas, the circumferential root fracture occurred, and non-weak areas kept intact. It was indicated that the designed film cover meets the technical requirements.