The invention discloses a method used for automatically compensating the television image brightness dark field in the field of television image technique, comprising the steps as follows: S1: the average value of single pixel brightness is calculated, namely, the brightness average value of each frame of image is used for dividing the pixel value of the frame of image; S2: the dark field image brightness compensation value is calculated, namely, for the dark field image, the brightness compensation value is gained according to the average value of single pixel brightness gained according to the S1 step; S3: the brightness compensation is carried out; namely, the brightness compensation value gained in the S2 step is added to the current image brightness value and the sum thereof is taken as a new brightness value. The television image dark brightness automatic compensation method of the technical proposal of the invention uses the brightness average of single pixel as the brightness measurement standard of one frame of image, can be applicable to various modes and be compatible for line-by-line and interlacing, can effectively improve the intelligence of the television, reduce the eye fatigue and meet the healthy concept of the modern.