The aim is to study quality standard of bezoar soft capsule.The microscopic identification and TLC were used for qual. identification.The Gutzeit method was used for limit test of arsenic trioxide in realgar, and the gas chromatog. was used to determine borneol content.The microscopic identification could successfully identify rhubarb.The TLC could successfully identify artificial bezoar, rhubarb, scutellaria baicalensis and borneol.The limit of arsenic trioxide conformed to standardThe borneol had good linearity.