It is well known that Spontaneous Parametric Down-Conversion （SPDC） is an important way to produce entangled photons with various degrees of freedom， such as polarization， spatial， time and Orbital Angular Momentum （OAM） and so on^［1-6］. As a main resource in quantum information processing， entangled photons have been applied in quantum teleportation^［7］， quantum dense coding^［8］， Quantum Imaging （GI）^{［3， 9］} and quantum metrology^［10-11］. Two-qubit states based on the position correlations of entangled photons are referred to as spatial two-qubit states^［12-16］， which can be collected by position correlated detectors in linear optical system. This spatial two-qubit entangled states can also be used in quantum teleportation^［17］， quantum secure direct communication ^［18］， quantum key distribution^［19］ and the verification of quantum nonlocality^［20-21］.