The amorphous comblike polymers based on methylvinyl ether/maleic anhydride alternating copolymer backbone and on oligo-oxyethylene side chains were synthesized according to our previous work．The dynamic mechanical properties of the polymers and their LiClO4 complexes were investigated by means of DDV-II-EA type viscoelastic spectrometry．The results show that the polymers and their LiClO4 complexes possess two type of transition in．the temperature range from 173K to 373K．β-transition of the polymer is assigned to PEO side chains．The temperatu-re of β-transition increase with increasing LIClO4 amount added．a-transition of the polymer is assigned to the polymer main chains．As for the a-transition temperatu-re．when the salt content increases there is a maximum at the ratio of Li／EO being 028．The relation between LiClO4 amount added and conductivity is rather comp-lex．It shows more than one peaks，one is located in the range of ratio of Li／EO less than．014．another one is located at the ratio of Li/EO =．028．The tempera-ture dependence of ionic conductivity was studied Data indicate the Arrhenius re-lationship is not held．But the plot of lgσ against 1/(T—To) shows the unusual dual VTF behavior when using side chains glass transition temperature as To．This is attributed to the a-transition of the polymer main chains．