In this paper,a rotating scanning tomography interferometer based on F P interferometer has been designed according to the mathematic model of optical computerized tomography (OCT) multi dimension Radon transform.The effects of five important parameters to the reconstruction accuracy in OCT have been discussed so that the guidance can be given to the design of instrument and the decision of experimental accuracy.For the reconstruction in the case of severely incomplete data of flow field under wind tunnel,the orthogonal projection data collection method of limited angle and information amalgamation reconstruction using transcendental knowledge have been proposed.