The invention relates to a light-gathering and floodlight lightweight portable lamp which comprises a lamp holder component, and the lamp holder component further comprises a lamp holder bottom shell (7), a light source component arranged in the lamp holder bottom shell (7), a transparent part (4), a lamp holder surface shell (2) for fixing the transparent part (4) on the lamp holder bottom shell (7) and a floodlight piece (1), wherein a sliding slot (21) for inserting the floodlight piece (1) is arranged on the lamp holder surface shell (2). The floodlight piece can be conveniently and fast replaced according to needs through the sliding slot arranged on the lamp holder surface shell, thereby leading the lightweight portable lamp to realize the lighting with different light-gathering and floodlight ways.