The utility model discloses a three -dimensional electric capacity sense of touch sensing array of floating electrode formula. This sensing array is by (i) N (i) (i) (i) N forms, and every sensing subelement forms by responding to electrode layer, central insulating layer, floating electrode layer and superficial layer combination from supreme down in proper order by a structure and measure -alike square sensing subelement. Response electrode layer upper surface has the response electrode of four symmetric distributions, there is four positive square groove center insulating layer center, floating electrode layer lower surface has a floating electrode, the superficial layer center is trapezoidal block structure. Every silicon rubber capacitanc sense of touch sensing subelement all has four centrosymmetric electric capacity units, can effectively realize (i) X (i) - (i) Y (i) - (i) Z (i) three -dimensional pressure sensing, rebuild by the perfect sense of touch function that realizes artifical artificial limb. Interface circuit with the fragility processes on responding to the electrode layer simultaneously, improves sensing array's flexural rigidity, can bear bigger drawing with crooked.