The invention discloses a method for rapidly measuring small hydropower station networking line loss allocation proportions. The method comprises steps that step 1, line loss of each small hydropower station on a distribution network line is calculated; step 2, total line loss of the distribution network line is calculated; step 3, each small hydropower station line loss allocation proportion of the distribution network line is calculated according to proportions of line loss of each small hydropower station to the total line loss of the distribution network line. The method is advantaged in that (1), comprehensively considering influence of a power factor, a transmission distance and a load rate on line loss, the line loss allocation proportions of the multiple small hydropower stations on the distribution network line can be calculated; and (2), required data is simple and easy to acquire, line loss allocation calculation is convenient for each economic benefit party, algorithm transparency is high, a line loss allocation problem and social contradiction can be excellently solved, and relatively good practicality is realized.