Ziziphus angustifolia is a tree in the family Rhamnaceae. The specific epithet angustifolia means 'narrow leaves'.
Ziziphus angustifolia grows up to tall, with a trunk diameter of up to . It has buttresses up to high and extending out to . The grey-brown bark has . The leaves are ovate to elliptic and measure up to long. The, in, feature yellow to green flowers.
Ziziphus angustifolia is native to an area from Myanmar and the Philippines in the north, south to Java and east to the Solomon Islands. Its habitat is in dipterocarp forests to elevations of .