The utility model discloses an automobile tire pressure detector, include: the control valve, it sets up in tire pressure detection device's lower part, and the lower extreme can be dismantled with the automobile inflating valve and be connected, the air duct, but it is heliciform extending structure, and one end and set up to be in the air guide hole intercommunication of control valve one side, pressure gauge, its lower extreme pass through the connecting piece with the other end intercommunication of air duct can be measured received gas pressure, adsorption equipment, it sets up pressure gauge's the back, can with on near the automobile body of the pressure gauge absorption tire, will pressure gauge is fixed with the automobile body. The design adsorption structure can adsorb adsorption equipment in any position of automobile body, makes things convenient for reading of tire pressure numerical value, has guaranteed tire pressure measuring accuracy. Install the control valve on the device, can open it when valve body and the installation of tire valve mouth are safe, guaranteed the measuring accuracy, prevent to measure the tire pressure when surveyor is still offhand good.