The invention discloses a hydraulic component integrated testing device and a machining method thereof. The device comprises an integrated block, a pressure measuring channel and testing ports; a main testing port, the pressure measuring channel and an auxiliary testing port are arranged on the integrated block; the main testing port is communicated with the pressure measuring channel; the auxiliary testing port is communicated with the pressure measuring channel; the main testing port and the auxiliary testing port are arranged on the identical side of the integrated block; and a non-orthogonal connecting channel is arranged between the auxiliary testing port and the pressure measuring channel. The method comprises respectively positioning the pressure measuring channel and the main testing port on all operating surfaces of the integrated block according to the design requirements, and connecting the pressure measuring channel with the auxiliary testing port by drilling the three-dimensional dip angle connecting channel. The device ensures that the auxiliary testing port is communicated with the pressure measuring channel through the three-dimensional dip angle connecting channel, so that the main testing port and the auxiliary testing port can be arranged on the identical side or arranged adjacently, great convenience is provided for the production inspection and maintenance testing, and the production efficiency is improved.