a new portable slow cooker capable of engaging a lid and a liner container can is provided to prevent the soup from spilling out . the structure of the present invention comprises a cooking body , a liner container , a lid and a handle , wherein the liner container is disposed within the cooking body , and the lid is disposed on the opening of the liner container . the handle is spanned over the lid and has , lower ends in vertically slidable cooperation with handle boxes disposed at aside surface of the cooking body . the handle is locked by the handle boxes when slides to an lowest position , so as to press the lid to form a sealing engagement with the liner container . as long as the handle is pushed to the lowest position , being locked , the lid and the liner . container can be engaged to prevent the soup from spilling out .