The invention discloses a frequency change signal two-dimensional direction finding method and device adopting two sensors. The method comprises the following steps of acquiring the collected phase differences phi n, the frequencies fn and the signal-to-noise ratios SNRn of the two sensors; randomly dividing the data of the collected phase differences into K groups; for each group of the collectedphase differences, calculating weighted distances between complex numbers composed of the collected phase differences and complex numbers composed of phase differences corresponding to angles on an incident angle grid, thereby generating two-dimensional distance matrixes; searching for each distance matrix to obtain a matrix serial number corresponding to a minimum value in each distance matrix;defuzzifying the collected phase differences to obtain a non-fuzzy phase difference matrix; solving the two-dimensional incident angles; sequentially sorting K groups of the two-dimensional incident angles, and comparing a current result with a previous result; and if K comparison values L<1>-L<K> are all smaller than a threshold, outputting the current result, otherwise, according to the currentresult, generating K groups of theoretical phase differences, calculating the distances, defined in the description, between the collected phase differences phi n and the theoretical phase differencesdefined in the description, comparing the distances defined in the description, and re-classifying the phi n to the corresponding k-th group when the distance defined in the description is minimum.