▎ 摘　　要

NOVELTY - The utility model claims a disc brake device for electric bicycle, comprising an upper pump; a brake pump and two brake blocks; the brake pump is provided with a main oil cavity and an adjusting oil cavity; the main oil cavity is connected with the brake block through the main piston; the upper pump is connected to the adjusting oil cavity through the oil pipe; one side of the adjusting oil cavity is provided with an adjusting piston; one side of the brake pump is provided with an inner screw hole and the side is slidingly installed with a remote control motor through the safety one side of the adjusting piston is connected with a driving rod and the driving rod is provided with a thread section; one side of the remote control motor is screwed with a triggering circular plate; the brake pump is provided with a travel switch A matched with the triggering circular plate. starting the remote control motor to drive the adjusting piston to compress and adjust the oil cavity or reset; when compressing, the brake block is locked in the brake disc; the vehicle wheel is prevented from sliding or limiting the normal driving; it has the function of safety theft; The brake sheet of the utility model uses graphene-based composite friction material, has stable friction coefficient and excellent thermal conductivity, and ensures the brake performance and service life of the brake sheet.