The High and Low Temperature (3-Zone) Thermal Shock Test Chamber consists of high temperature zone (preheat zone), low temperature zone (precool zone) and test zone (room temperature zone) with independent air flow switches which can lead the air inside the low or high or room temperature zone to the test zone, which makes the testing samples rapidly undergoing three zones’ temperature by turn. The samples are immobile during the whole test. This kind of test chambers is designed to test the reliabilities to rapid-rate temperature change of a complete product, machine components and parts and materials. It can test the samples’ chemical changes or physical damages aroused by thermal expansion in the shortest time, and also know of the effects on the samples under one or several times of tests with rapid-rate temperature change.