The work aims to study the antibacterial properties of commercial low density polyethylene (LDPE) and high density polyethylene (HDPE) antibacterial sheets and the migration behaviour of antibacterial agents in composite sheets in food simulants. Commercial antibacterial agents (SRT, ECO, LF, JL) were melt-blended with LDPE or HDPE to produce antibacterial sheet. The antibacterial properties of the sheet were studied by means of film application, inhibition zone method and simulated real environment method. The migratory behaviour of antibacterial agent in 3% acetic acid (volume fraction) was studied. The antibacterial rate of LDPE sheet containing LF, JL and 1.5% SRT (mass fraction) was above 90%. ECO's sheet has an antibacterial rate of over 99%. The migration amount of inorganic elements in antibacterial sheet does not exceed the migration limit stipulated by EU regulations.