Medicine plastic box with good self-sealing performance

The utility model provides a plastic medicine box with good self-sealing performance, and relates to the technical field of plastic medicine boxes. The medicine plastic box with the good self-sealing performance comprises an outer box body and an inner box body, the inner box body is fixedly installed in an inner cavity of the outer box body, an outer box cover and an inner box cover are installed on the outer box body and the inner box body respectively, and an outer concentric-square-shaped sealing plate and an inner concentric-square-shaped sealing plate are fixedly installed at the upper end of the outer box body and the upper end of the inner box body respectively. The outer concentric-square-shaped sealing plate and the inner concentric-square-shaped sealing plate are inserted into the outer box cover and the inner box cover respectively, a medicine carrying tray is arranged in the inner box body, and the outer box cover is connected with the outer box body through a fastener. The medicine plastic box w