The invention discloses a method for preparing a high-strength heat-resistant 
silicon resin modified acrylic ester pressure-sensitive 
adhesive and relates to a method for preparing a modified acrylic ester pressure-sensitive 
adhesive. The method solves the problems of low peel strength and low 
temperature resistance of the conventional organic 
silicon modified acrylic ester pressure-sensitive 
adhesive. The method may comprise the following steps of: adding part of 
dibenzoyl peroxide, part of solvents, part of soft monomers and part of hard monomers into a reaction kettle to react; mixing MQ 
silicon resin, the residual soft monomers, the residual hard monomers, the residual 
dibenzoyl peroxide and the residual solvents uniformly and adding the mixture into the reaction kettle to react; 
coating the obtained adhesive solution on a base material; and 
drying. The method may also comprise the following steps of: adding part of solvents, part of 
dibenzoyl peroxide, part of soft monomers and part of hard monomers into the reaction kettle to react; mixing a 
functional monomer, hydroxyl-containing SQ silicon resin, the residual soft monomers, the residual hard monomers, the residual dibenzoyl 
peroxide and the residual solvents uniformly and adding the mixture into the reaction kettle to react; mixing the obtained adhesive solution and a cross-linking agent uniformly and 
coating the mixture on the base material; and 
drying. The high-strength heat-resistant silicon 
resin modified acrylic ester pressure-sensitive adhesive has the peel strength of 14 to 18 N / 25mm and is applied in the fields of high temperature of 200 DEG C.