The invention discloses an automobile engine combustion chamber detection apparatus. The apparatus comprises a cylinder cover, a sensor, a sensor protective sleeve, and a sealing gasket and a sealing ring which are respectively sleeved on the inner end of the front portion of the sensor protective sleeve and the middle portion of the sensor protective sleeve. The sensor is in threaded connection with the central portion of an inner hole of the sensor protective sleeve; the cylinder cover is provided with a protective sleeve installing hole for installing the sensor protective sleeve; the protective sleeve installing hole comprises a first installing hole, a second installing hole and a third installing hole; the third installing hole is a threaded opening and communicates with an automobile engine combustion chamber; the front portion of the sensor protective sleeve successively passes through the first installing hole and the second installing hole and then is in threaded connection with the third installing hole; and the middle portion of the sensor protective sleeve is in sealing fit with the second installing hole through the sealing ring. The apparatus relates to the technical field of automobile engine detection and can directly detect and record the temperature and pressure in the automobile engine combustion chamber so that technical personnel can correctly master and analyze the working performance of an automobile engine and make improvements.