The invention discloses an experimental apparatus for simulating non-conventional oil and gas reservoir microcracks, belonging to the technical field of physical simulation. The apparatus includes a micro-crack model, a cover plate, and a bottom plate, the top of the bottom plate is provided with a groove matched with the micro-crack model in shape, the micro-crack model is embedded in the groove, the top of the bottom plate is provided with two opposite communicating grooves, the two communicating grooves are arranged at the two sides of the groove, the two communicating grooves are communicated with the groove, the cover plate covers the bottom plate, two communicating holes are arranged in the cover plate, and the communicating holes are corresponding to the communicating grooves and are communicated with the corresponding communicating grooves. The experimental apparatus can protect the micro-crack model, can bear large pressure, and can carry out the experiment under a high-temperature and high-pressure environment.