对平行排列５ Ｃ Ｂ（４′ｎｐｅｎｔｙ１４ｃｙａｎｏｂｉｎｐｈｅｎｙ１） 丝状液晶在静磁场中扭曲变形做了严格的数值解，给出了严格分布情况；利用光学“４ ４”矩阵算法，计算了线偏振光在严格分布下的传输情况；在实验方面，应用光学相位延迟法对平行排列５ Ｃ Ｂ 丝状液晶在静磁场中（ 温度２７ ℃） 线偏振光的通过情况进行了测量．理论计算和实验结果说明在非长螺距近似条件下可用线偏振光对平行排列丝状液晶的物理性质进行实验研究． A rigorous numerical solution was given to the distortion of the parallel arranged 5 C B (4’npenty14cyanobinpheny1) filiform liquid crystal in static magnetic field, giving a rigorous distribution. Using the optical “4  4” matrix algorithm , The transmission of linearly polarized light under strict distribution was calculated. In the experiment, the optical phase retardation method was used to measure the passage of linearly polarized light of parallel-arranged 5 C B filament liquid crystal in static magnetic field (temperature 27 ℃) . The theoretical calculation and experimental results show that the linear polarization of non-long-pitch approximation can be used to study the physical properties of parallel arranged filamentous liquid crystals.