Abstract: The paper studied the continous counterflow extraction of green tea by L screw extractor Concevning the technology on baton extraction, the extracting density, extracting effciency, F.E.A and flavour.ware compared When the extracting temperacture was 85℃ , with 27.0 min time, the ratio of water and tea was 8.3, extracting density of continous counterflow extraction 0.064 kg/L, extracting ratio 83.2% 、 F.E.A 0.92 g/ L· min, and the flavour nice, in comparison with the batch extraction, extracting effciency increased 4.3 times, extracting ratio increased 30% and extracting effciency increased 3.4 times.

Key words: Green tea Continous counterflow extraction Technology