Optical limiting behaviors of a methyl-red doped liquid crystal mixture-E7 are studied using a Q-switched frequency-doubled Nd∶YAG laser at 532 nm with a few ns pulse-width. Far-field optical irradiance distributions beyond a sample cell and their variations with increasing the energy incident upon the cell are also observed. The experimental results show that, for the 46 μm thick methyl-red doped liquid crystal mixture E7 film with a weight-to-volume ratio of 6 mg/0 5 ml, the clamped output values of the first three tests are 0.70, 1.00 and 1.52 μJ, respectively, and the input limiting thresholds are between 23 and 28 μJ. The unusually low clamped output property of the film is very significant to the optical limiting for eye and sensor protection.