Abstract: In our report， Based on the electro-optic properties of graphene， a kind of multifunctional metamaterial absorber with the properties of optically transparent， flexible， tunable and wideband at low frequency was designed. The commercial electromagnetic simulation software CST Microwave studio was used to calculate the absorption of absorber at different Fermi level of graphene. The results showed that the absorption of absorber exceeds 90% from 600 MHz to 1 GHz when the Fermi level of graphene is 0eV， and the absorption can be tunable by altering the applied voltage. The simulation results suggested that the absorption property of absorber has the property of polarization-insensitive and wide-incident angle， and which has the advantages of high absorption， optically transparent， flexible and tunable wideband absorption and so on. The absorber has the potential application on the fields of electromagnetic stealth， detection and sensing at low frequency.