The invention provides a high-sensitivity capacitive-type pressure sensor and a manufacturing method therefor. The sensor comprises a substrate (1), a pressure elastic film (2), a first fixed base (31), a second fixed base (32), a third fixed base (33), a mechanical rod (4), a supporting shaft (5), a first interdigital electrode (61), a second interdigital electrode (62), a first lead electrode (71), a second lead electrode (72), and an insulating material (8), wherein the first, second and third fixed bases are fixed on a substrate (1), and the substrate (1) is provided with the pressure elastic film (2). The central upper surface of the pressure elastic film (2) is connected with one end of the first fixed base (31) through the insulating material (8). Meanwhile, the other end of the first fixed base (31) is connected with one end of the mechanical rod (4). According to the invention, the deformation of the pressure elastic film (2) can be amplified in a multiplied manner, thereby improving the capacitor detection sensitivity.