The invention provides a shall monitoring camera, which comprises a front housing, a shielding sheet, two front housing fixing frames, a body upper cover, a body lower cover, a mounting rack 1 and a mounting rack 2, a button closing ring, a back board closing ring, a radiator, a silica gel radiator, a back board, a back board film, a mounting seat and a plurality of fasteners, also comprises six different PCB (Printed Circuit Board) assemblies, wherein the camera is connected with a thread between sheet metal components through pins and sockets of the PCB assemblies and the PCB assemblies. The small monitoring camera has the advantages of small and exquisite as well as attractive and novel structure, high definition, high color reduction reality, multiple performances, multiple functions and wide practical situation.