Abstract: In this paper, based on the working principle and working environment of the electric transfer flat car, combined with the main practical problems of the electric transfer flat car electric system used online by a company, through redesign of the original electrical control system of the transfer flat car, the low-voltage 48V battery power supply control system of the 50t transfer flat car is developed in this article. Through the actual use and verification of the site, the low voltage transfer flat car realizes stepless speed regulation, remote wireless control and automatic fixed stop. The design defect of the on-line transfer flat car is solved, the service life of the transfer flat car is increased, and the manufacturing and maintenance costs are reduced.