An integrated prosthetic foot with transverse arch, comprising a sole curved plate, an adapting piece, a first bolt group, a second bolt group, a third bolt group and a fourth bolt group, wherein the sole curved plate comprises a rear flat plate, a rear transition plate, a middle arc plate, a middle transition plate and a front flat plate, the rear flat plate, the rear transition plate, the middle arc plate, the middle transition plate and the front flat plate are smoothly connected into a whole unit in sequence from back to front; the adapting piece comprises a square frustum, a platform and a main body, the square frustum is fixedly connected to a rear portion of the main body by means of the platform; the rear flat plate and the front flat plate are broken lines, the broken lines are formed by connecting two straight lines with a height difference of 2mm by means of arc transition; the rear transition plate and the middle transition plate each smoothly transition from an upward convex arc shape to a straight shape, with an arc radius of 20mm-25mm, a central angle of 80°-85°, and a curvature going from large to small; the middle arc plate has a transverse curve designed with reference to a human foot transverse arch curve, and a front end and a back end are connected by means of a smooth arc transition; the sole curved plate is wholly defined by a longitudinal sole curve, an outer longitudinal curve and an inner longitudinal curve in a front and back direction, the longitudinal sole curve comprises a first longitudinal curve, a second longitudinal curve and a third longitudinal curve; the first longitudinal curve is a downward concave arc with an arc radius of 60mm-70mm and a central angle of 43°-45°, the second longitudinal curve is an upward concave arc with an arc radius of 50mm-60mm and a central angle of 74°-76°, and the first longitudinal curve and the second longitudinal curve are connected in sequence and smoothly in a tangential manner from back to front; the third longitudinal curve is a downward concave arc with an arc radius of 100mm-110mm and a central angle of 40°-42°, and the second longitudinal curve and the third longitudinal curve are connected in sequence and smoothly in a tangential manner from back to front; shapes of the outer longitudinal curve and the inner longitudinal curve are drawn according to a basic shape of a human longitudinal arch and have a greater inner curvature and a smaller outer curvature; a mathematical expression of the outer longitudinal curve is: y = -0.0015x 3 +0.3313x 2 -3.5641x; a mathematical expression of the inner longitudinal curve is: y = -0.0025x 3 +0.5492x 2 -9.6027x; and the adapting piece and the sole curved plate are arranged vertically, and are fixedly connected by the first bolt group, the second bolt group, the third bolt group and the fourth bolt group; a bottom surface of the main body of the adapting piece has the same size as arc surfaces of the rear transition plate, the middle arc plate and the middle transition plate of the sole curved plate; a middle potion of the main body is provided with three elliptical holes of a weight-reducing hole group, a short axis of an ellipse is 2mm-8mm, and a long axis of the ellipse is 9mm-30mm; and the bottom surface of the main body is a curved surface designed per the human foot transverse arch curve, and fits an upper surface of the sole curved plate. a mathematical expression of the outer longitudinal curve is: y = -0.0015x 3 +0.3313x 2 -3.5641x; a mathematical expression of the inner longitudinal curve is: y = -0.0025x 3 +0.5492x 2 -9.6027x; and the adapting piece and the sole curved plate are arranged vertically, and are fixedly connected by the first bolt group, the second bolt group, the third bolt group and the fourth bolt group; a bottom surface of the main body of the adapting piece has the same size as arc surfaces of the rear transition plate, the middle arc plate and the middle transition plate of the sole curved plate; a middle potion of the main body is provided with three elliptical holes of a weight-reducing hole group, a short axis of an ellipse is 2mm-8mm, and a long axis of the ellipse is 9mm-30mm; and the bottom surface of the main body is a curved surface designed per the human foot transverse arch curve, and fits an upper surface of the sole curved plate.