The invention discloses a handheld portable illumination observer for a limited space and a dark environment. The handheld portable illumination observer comprises a tubular observation part, a lighting part axially arranged around the observation part, and an 
external connection part, the lighting part comprises a panel, an LED 
bulb lamp, a conduction 
copper plate, a 
soldering tin contact, a fastening thread, a bottom cover, a manual switch knob, a lighting part structural body, a first objective lens, a stainless steel internal thread, a sealing strip fixing buckle, a 
water stop sealing strip, an LED 
bulb lamp thread fixing base, a battery clamp, a battery, an inner partition plate and a conductive 
metal base; the observation part comprises an 
eyepiece, a stop card, an observation part structural body, an aluminum reflection mirror surface inner cavity and a second objective lens; and the 
external connection part is used for externally connecting an observation device, a detection device and a 
video recording device, so that additional detection and 
video recording functions besides illumination observation are realized, and corresponding activities are carried out. The observer has the advantages of small size, simple structure, convenience in 
prefabrication, less 
material consumption, short manufacturing and 
processing period and low 
processing cost, and the raw materials and parts are semi-finished products and are convenient to purchase.