The invention discloses a photographing function enhancer for a smartphone. The photographing function enhancer comprises a camera lens assembly and a main controller, wherein the camera lens assembly comprises a zoom lens, a drive motor, a visible light detection sensor, a diaphragm shutter, a jitter amount detection sensor, a large-size image sensor and infrared lamp light supplement equipment; the main controller comprises a lens control module, an IR_CUT shift control module, a diaphragm shutter control module, an anti-jitter control module, a power supply module, an infrared lamp control module, an image processing module and a WIFI drive module. The photographing function enhancer disclosed by the invention effectively realizes the clear photographing of various distances, also can be used for achieving photographing in daytime, in night or in a dark environment, the relatively impeccable and professional photographing function and the relatively perfect image quality, and implementing browsing and control through application programs, is convenient to use and can be used for achieving the photographing of various scenes; moreover, due to a modular design, the photographing function enhancer disclosed by the invention is used after being hung on a mobile phone and is convenient to dismount, small in size and convenient to carry.