A pushbutton type easy-code-change handle lock includes an outdoor assembly, a latch bolt arresting member, a latch bolt, and an indoor assembly. The outdoor assembly is mounted to an outside surface of a door panel and is coupled to an end of the latch bolt arresting member. The latch bolt arresting member drives the latch bolt to move. The indoor assembly is coupled to an opposite end of the latch bolt arresting member. The outdoor assembly includes a mechanical combination lock. When a user enters a correct combination of codes, the mechanical combination lock is operated and the external door handle and the latch bolt are operated synchronously to open the door; and if no code is provided, a key may be used to open the door; and if both codes and key are not provided, the external door handle and the latch bolt cannot be operated synchronously.