The present invention relates to a secondary battery laminating device. The secondary battery laminating device for bonding an electrode assembly to a separator includes a transfer part transferring the electrode assembly in a state in which the electrode assembly is disposed on the separator; and a bonding part disposed on a transfer path of the transfer part to contact an entire surface of the electrode assembly and apply heat to the electrode assembly, thereby bonding the electrode assembly to the separator. Thus, a uniform pressure is applied to the electrode assembly to firmly bond the electrode assembly to the separator, thereby manufacturing a secondary battery having superior durability.