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The proliferation of electronics equipments has led to a new kind of pollution: theelectromagnetic interference.Microwave-absorbing materials have been attracting more andmore attention in electromagnetic protection field, due to their conversion properties fromelectromagnetic energy to heat.Thin, flexible, light weight microwave absorbing materialsare desirable in various applications including customers products, protective clothing and themilitary field.Here, a controllable design of microwave-absorbing textiles is prepared usingthe Layer-by-Layer (LbL) assembled technique.In this research work, LBL assemblytechnique was used to prepare microwave-absorbing cotton fabric with multi-walled carbonnanotubes (MWNTs) coating.Interestingly, a thin CNTs film prepared with 10 bilayers oncotton exhibit 54％ of absorption at 10.86 GHz with a matching total shielding effectivenessof 55.1％.The absorption is the dominant shielding mechanism of our samples.This methodhas large potential for building new microwave absorbing textiles with improved performance.