The invention discloses a solar tracking angular deviation detector for detecting errors of a tracking system in the photovoltaic power generation. By using the detector, the analytical value of the solar tracking angular deviation can be obtained, thereby reasonably and effectively evaluating the solar tracking precision of the traditional solar tracking angular deviation in the market in the photovoltaic power generation. The solar tracking precision is an important index of the solar tracking system and an important basis for measuring the quality of the solar tracking system. For achieving the aim, the solar tracking angular deviation can be measured by adopting the linear array CCD (Charge Coupled Device); an optical path and a signal processing circuit are designed; and the solar tracking angular deviation value can be determined according to the difference of sunlight incident angles and the change relationship of the imaging of the edge projection of a luminous seam on the CCD, mainly including the detection for the tracking angular deviation of an elevating angle and an azimuth angle; and finally, the detection result is subjected to the data processing and analyzing and is displayed by an intelligent display terminal, or can be transmitted to other processors through serial ports for further processing.