Using 2D angular correlation of positron annihilation radiation (ACAR) experiment, we have performed a systematic study of the spin dependent and Fermi surface of the colossal magneto-resistance CMR La Sr MnO revealed a cuboids hole surface centered on R point and a spheroid electron surface centered on Γ point. A comparison with the earlier results showed qualitative agreement. However, the current results could reveal the dimension of the electron surface centered on Γ point that was predicted in the earlier 2D-ACAR measurements.