A brake handle device, mounted on an electric tractor body, wherein the electric tractor body comprises a driving motor, a wheel assembly, a power supply and a frame; the wheel assembly is connected with the driving motor; the driving motor is used for driving the wheel assembly to rotate; the power supply is electrically connected with the driving motor, and is used for supplying power to the driving motor; the frame is connected to the wheel assembly; and the frame is provided with a handlebar; characterized in that the brake handle device comprises: a base, which is arranged at a position of the handlebar of the frame; a microswitch, which is electrically connected with the driving motor and the power supply and comprises a main body part and a key, wherein the main body part is arranged on the base; the key extends into the main body part and can elastically expand and contract relative to the main body part; a lever, which is rotatably arranged on the base and can be abutted against the key, wherein the lever comprises a cam which is rotatably arranged on the base and is abutted against the key, a lug which is connected with the cam, a holding part which is connected with the cam and is used for a user to apply a holding force to the lever; and an elastic piece, which is arranged on the base, is connected with the cam of the lever, and is used for providing an elastic force to drive the lever to rotate and reset in a direction far from the handlebar; one end of the elastic piece is sleeved on the lug, when the holding part of the lever is held by operator, the holding part is rotated in a direction close to the handlebar, so that the cam presses the key into the main body part for a preset length, thereby controlling the microswitch to conduct the electric connection between the power supply and the driving motor; and when the holding part is released by operator, the holding part is rotated and reset in the direction far from the handlebar by the elastic force of the elastic piece and the cam is separated from the key, so that the key is elastically reset relative to the main body part, thereby further controlling the microswitch to disconnect the electric connection between the power supply and the driving motor. a base, which is arranged at a position of the handlebar of the frame; a microswitch, which is electrically connected with the driving motor and the power supply and comprises a main body part and a key, wherein the main body part is arranged on the base; the key extends into the main body part and can elastically expand and contract relative to the main body part; a lever, which is rotatably arranged on the base and can be abutted against the key, wherein the lever comprises a cam which is rotatably arranged on the base and is abutted against the key, a lug which is connected with the cam, a holding part which is connected with the cam and is used for a user to apply a holding force to the lever; and an elastic piece, which is arranged on the base, is connected with the cam of the lever, and is used for providing an elastic force to drive the lever to rotate and reset in a direction far from the handlebar; one end of the elastic piece is sleeved on the lug, when the holding part of the lever is held by operator, the holding part is rotated in a direction close to the handlebar, so that the cam presses the key into the main body part for a preset length, thereby controlling the microswitch to conduct the electric connection between the power supply and the driving motor; and when the holding part is released by operator, the holding part is rotated and reset in the direction far from the handlebar by the elastic force of the elastic piece and the cam is separated from the key, so that the key is elastically reset relative to the main body part, thereby further controlling the microswitch to disconnect the electric connection between the power supply and the driving motor.