Controller for electric bicycle

The invention discloses a controller for an electric bicycle. The controller is advantageous in improved assembly efficiency, reduced product cost, and improved waterproof and heat dissipation performance. The controller mainly comprises a housing, a circuit board, a snap spring and end covers, wherein the end covers are arranged at two ends of the housing, and the snap spring is arranged in the housing; a cavity structure is defined in the housing; the upper part of the housing is provided with a downward hook-shaped protrusion; the inner wall of the left side of the housing is provided witha protruding support stage; and a power tube on the circuit board is disposed between the inner wall of the housing and the protrusion at the upper wall of the housing; and the snap spring is arrangedbetween the side wall of the housing and the hook-shaped projection and can press the power tube; a groove is formed in the inner wall of the hook-shaped protrusion and is used for fixing the snap spring; and an insulating ma