The design of gas stripper assembly in a tandem terminal of AMS facility is a compromise giving consideration to the conflicting requirements of stripper gas thickness, beam transmission and vacuum conditions inside acceleration tubes. A new stripper arrangement is being under developed for PKUAMS. The foil stripper will be moved to the position behind the gas stripper, a wider canal will be used as the stripper channel and an AST100 hybrid pump will be installed in the terminal to recirculate the stripper gas. Calculation has been carried out for the design and showed good results. The gas pressure in center of stripper tube could be enhanced by a factor of 2, and the vacuum conditions in both the LE and HE acceleration tubes could be improved 2 and 1.5 orders, respectively. The beam acceptance of the stripper could be enlarged due to using a wider channel.
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