Abstract: In this paper, a flexible energy harvesting antenna array for microwave power transmission (MPT) system is proposed, which has the characteristics of large-area, low-cost and easy-deployment. Since the surface of the energy harvester is usually uneven, the traditional rigid antenna cannot complete the conformal operation. Therefore, in order to adapt to more all kinds of application scenarios, the flexible materials to design antenna array is used in this paper. The dielectric substrate and radiation conductor are based on polyimide and new liquid metal gallium-indium alloy, respectively (the proportion of gallium is 75.5%, and the proportion of indium is 24.5%). Since the MPT application scenario is very complex and changeable, its portability is required. In order to realize the convenience of harvesting antenna array retracting and releasing, the structure design is carried out by using the curling folding/inflatable deployment technology. CST software is used to simulate the designed flexible harvesting antenna from unit to array, and the working frequency of the antenna is 5.8GHz. The maximum harvesting efficiency is more than 55%, and the harvesting efficiency is more than 35% under bending conditions The simulation results prove the validity and correctness of the work.