Adsorption improver as well as preparation method and application thereof

The invention provides an adsorption improver as well as a preparation method and application thereof, and relates to the technical field of oilfield chemistry in the petroleum industry. The invention relates to an adsorption improver. The adsorption improver is prepared by successively carrying out vulcanization modification and amidation modification on an adsorbent. The adsorption improver can improve the temperature-resistant and salt-resistant calcium adsorption capacity of the adsorbent, so that the temperature-resistant and salt-resistant calcium performance of the lubricant is improved, and the application requirements of the lubricant under the conditions of high temperature and high salinity are met. According to the preparation method, an existing adsorbent is selected for modification, through vulcanization reaction and amidation reaction, an extreme pressure agent sulfur element and a strong adsorption group amido are introduced, meanwhile, a cross-linked network structure is formed, the temperat