Konjac glucomannan-carrageenan edible blend films were prepared. The mechanical performance and optical performance of the edible film were tested. The results showed that the comprehensive mechanical performance and optical performance of the blend film is the best when the mass ratio of blend film is 3 颐 1, and the blend film has good compatibility and synergistic effect; plasticizer glycerin addition can significantly improve the mechanical performance and optical performance of the blend film; when glycerin addition is 10% ( mass ratio), light transmittance of the blend film can achieve 90% above. This blend film is expected to be used to develop new type of edible packaging film.