This article discusses the influence of accessory energy consumption on evaluation method of braking energy recovery contribution rate. The energy flow model of three types of the electrified buses were firstly analyzed. Then, methodologies for the economic contribution rate of the brake energy recovery system including accessories and the system without accessories were proposed. The test method of the braking energy recovery efficiency was analyzed and proposed combining with the practical application. Vehicle tests were carried out under the China city bus typical driving cycle. The tests demonstrated that the effect of vehicle accessory system energy consumption on the braking energy recovery contribution rate is very little.