Test tube rack

The utility model discloses a test tube rack. The test tube rack comprises a rack body, wherein the rack body comprises an outer shell and an inner rack support; the rack support comprises a supporting plate and a base; circular holes and grooves are correspondingly formed in the supporting plate and the base respectively; baffles are also arranged on the rack support and separate the rack support into an open interval and closed intervals; a temperature sensor is arranged on a rotating shaft; visible light sensors are also arranged in the closed intervals; a heating wire is arranged in the base; a control circuit, a buzzer and a battery are arranged in a bottom disc; a display screen is arranged on a coaming; a control panel is arranged below the display screen. The test tube rack has the beneficial effects that the test tube rack can meet the time and temperature requirements in various tests and the illumination requirements in lightproof tests, can carry out heating automatically when the ambient temperatures are reflected to be too low, and can actively monitor the transmittance of light in the closed intervals; the monitored reaction time, temperature and transmittance of light can be set, and the buzzer is started for reminding when the monitored set values are reached.