A flexoelectric sensor model of cylindrical shell panel due to direct flexoelectric effect was established, Firstly, dynamic response of the panel was derived, Then, flexoelectric sensing theory due to the direct flexoelectric effect was employed, and modal voltage and power, Flexoelectric sensing signal induced by the flexoelectric effect contains two parts: the flexoelectric signal induced by the longitudinal bending strain and the flexoelectric signal induced by the circumferential bending strain, When the flexoelectric patch is infinite, the sensing characteristics of flexoelectric patch is the distributed sensing characteristics of each point, Finally, effects of different parameters on the sensing characteristics, such as mode shape, natural frequency, flexoelectric signal components, were analyzed to optimize the sensing signal, which was significant in engineering application,