A manual energy storage device for a circuit breaker, which includes a fixed support frame (1), the fixed support frame (1) is equipped with an eccentric rotation mechanism (2), and the eccentric rotation structure (2) is connected with a reciprocating connecting rod (4), The rotation of the eccentric rotation mechanism (2) can drive the reciprocating connecting rod (4) to do back and forth reciprocating motion, and the reciprocating connecting rod (4) is connected with a swing lever mechanism group (5), and the swing lever mechanism group (5) and the ratchet ( 6) The engaging ratchet (6) is mounted on the energy storage mechanism camshaft (7), and the rotation of the ratchet (6) can drive the energy storage mechanism camshaft (7) to rotate to realize energy storage. The present invention changes the traditional one-way rotational energy storage into that when the handle is operated for energy storage, no matter the handle is shaken clockwise or counterclockwise, the mechanism can store energy, making the energy storage operation more efficient and easier to operate. The operation force is smaller, which is more in line with the comfort of the human body when performing energy storage operations, and at the same time reduces the difficulty of assembly, optimizes the structure of the product, and improves the reliability of the manual energy storage device of the circuit breaker.