The invention provides a non-metallic cross-linking agent for ultra-high temperature fracturing fluid and the fracturing fluid, as well as preparation and application. The non-metallic cross-linking agent provided by the invention is mainly prepared from the following components in percentage by weight: 0.1-0.5% of organic aldehyde, 0.01-0.05% of organic phenol, 0-10% of organic alcohol, 0.05-0.5% of organic acid and the balance of water. The fracturing fluid provided by the invention has the advantages of small damage to the stratum, low cost, good temperature resistance and good gel breaking performance.