Wuhan Univ, Phys Sci & Tech Coll, Wuhan 430072, Peoples R China
; CAS, Inst High Energy Phys, Beijing 100039, Peoples R China
The performance of BES II Barrel Shower Counter (BSC) was carefully studied. Calibration and reconstruction of BSC were improved. Better determination of z coordinate, better resolutions on z coordinate and phi angle were achieved. A method to determine correct shower developing direction was given.