As one of the most common preprocessing methods of bamboo shoot drying, blanching treatment is for enzyme deactivation to prevent lignifications during processing and storage that may greatly influence the nutrition and eating quality of bamboo shoots. Polyphenol oxidase (PPO) can facilitate the lignin synthesis by participating in the oxidation process of phenolics. Phenylalanine ammonia-lyase (PAL) can catalyse the deamination of phenylalanine to produce cinnamic acid that will finally produce precursors of lignin under a series of enzymatic reactions. Peroxidase (POD) catalyses the decomposition of H2O2 during the last step of lignin biosynthesis, thus enabling the lignin monomer to produce polymerisation reaction and produce lignin (Shen et al., 2006; Luo et al., 2007). Therefore, it is very necessary to study the impact of blanching on the activity of PAL, POD and PPO. However, blanching may cause undesirable changes on physicochemical properties, such as colour, texture and nutrient content, on account of heatinduced but also diffusion or leaching losses (Sanjuan et al., 2005). Therefore, it is desirable to minimise the heat treatment impact, but keeping the enzymes inactive to a suitable residual level (Goncalves et al., 2010).