The invention discloses a shaped lithium-manganese soft package battery and a manufacturing method thereof. The manufacturing method comprises the following steps: (a) punching a large positive plate into a shaped positive plate; (b) punching a lithium strip into a shaped negative plate; (c) welding a positive tab and bonding a negative tab; (d) carrying out bending and adhesive-tape terminating on a diaphragm, the shaped positive plate and the shaped negative plate on the connected part of shaped negative element sheets and the connected part of the shaped positive element sheets in a winding manner to form a shaped battery core; (e) putting the shaped battery core into a shaped aluminum-plastic housing and carrying out primary sealing and electrolyte injection; and (f) carrying out secondary sealing to obtain the shaped battery. The shaped battery is customized according to the shape of a battery compartment of an electrical appliance; an effective space of the battery compartment is fully utilized; and the battery capacity is maximized, so that the service lifetime of the electrical appliance is prolonged.