Interleaving paper needs to meet heat resistant property in use,and it can be realized by adding some heat resistant additives.By comparing heat resistant property of two kinds of inorganic heat resistant additives and a kind of organic heat resistant additive,to search the appropriate additive for interleaving paper.It indicates that inorganic heat resistant additive has the better heat resistance while loses paper's strength,and organic heat resistant additive is helpful to paper's strength but has no significant contribution to heat resistance.The together of inorganic and organic heat resistant additive is good to heat resistance and strength.