FRS-XRSA is a new procedure to study crystallinity and orientational distribution of crystallites (ODC) of various preferred orientation polymers. It eliminates the overlapping of multipeaks which occures in the traditional pole figure method (PFM) by CPR

overcomes the difficulty of ghost texture which appears in the orientational distribution function analysis (ODFA) because FRS-XRSA is a direct method

and can obtain ODC of almost all of the important (hkl) plane normals by one measurement sequence. In present paper

the ODC of two kinds of biaxially oriented PET magnetic films were studied.Based on the crystal geometry principle(CGP)

the general relationship between crystallite-coordinate and sample-coordinate was set up and the ODC of unmeasured(h′k′l′)plane was dedyced.And up the formula of biaxially orientational function2hkl

i>

i=N

M

T

also was set up. By FRS-XRSA

we obtained biaxial pole figures of ten(hkl)palnes

pole figures of three main planes(100)、(010)、(105)、and their orientation function 2hkl

i>

fchkl

i

etc.The results are very satisfactory.