The invention relates to a power grid enterprise electricity-selling side risk assessment method based on a triangular fuzzy number and an improved analytic hierarchy process. The method specifically includes following steps: establishing a power grid enterprise electricity-selling side risk assessment index system; establishing a power grid enterprise electricity-selling side risk assessment index scoring standard; establishing a triangular fuzzy conversion function; establishing an index scoring mapping relation; establishing a determination matrix; determining the matrix consistency verification; returning to the previous step if the consistency is not satisfied; moving to the next step if the consistency is satisfied; calculating a weight coefficient; and determining an important risk factor. According to the method, risk assessment of various risk indexes is conducted through an expert scoring method, the electricity-selling side risk can be comprehensively evaluated, the assessment method is simple and easy to operate, but the subjectivity is relatively high; and the subjectivity of expert scoring can be reduced with the cooperation of a multi-dimensional expert scoring set based on the triangular fuzzy number so that the accuracy of results output by the subsequent analytic hierarchy process is improved.