The invention discloses a high-temperature resistant precision casting wax mould core release agent, which is characterized in that the release agent is made by mixing kerosene with 320 heat transfer oil based on the volume ratio of 1:9-11 under a sealed state and then uniformly stirring the obtained mixed oil. Compared with the existing urea core release agent used for precision casting, the high-temperature resistant precision casting wax mould core release agent made by mixing the high-temperature resistant low-price 320 heat transfer oil with the volatile kerosene is adopted for demoulding instead of the expensive release agent; and the price of the 320 heat transfer oil is ***-***, which is greatly lower than the price of the release agent of ***-***, and the 320 heat transfer oil can be normally used for a long time within the range of 50-180 DEG C without deteriorated and ineffective conditions, so no adhesion phenomenon occurs between a core surface and a die surface, thus improving demoulding effect and lowering rejection ratio.