The invention relates to a rural dispersed type coal-to-electricity heating reliability evaluating method. The method is characterized by comprising the following steps: calculating the minimum heating interruption interval INT under different outdoor temperature based on the temperature property of each heating device; performing simulation calculation on a power distribution net of each heatinguser under different outdoor temperature; if the power off time of the simulating heating device is beyond INT, recording as the heating fault, and then calculating the heating reliability index of single heating user under different outdoor temperature; and calculating the heating reliability indexes of different rural areas based on the probability module and heating equipment area proportion condition under different outdoor temperature. According to the method, the heating reliability evaluation is converted into power supplying reliability evaluation; the actual user heating device properties and the actual rural power network running mode are treated as the basis, so that the evaluation result is clear and simple and close to the reality; and reference and basis are provided to 'coalto electricity' project planning, designing, constructing and operating maintaining modes.