An LED lighting device, characterized in that, it including: a lamp housing; an LED module; electrical appliance; a lamp connecting member; wherein, the lamp housing is connected to a lamp pole through the lamp connecting member; the lamp housing contains bottom case and top cover, and the top cover and the bottom case constitute a cavity that accommodating the LED module and the electrical appliance; the top cover is rotatable connected with one side of the bottom case; the lamp connecting member (3, 4) is in the type of straight arm or bent arm; characterised in that the other side of the bottom case is connected to the other side of the top cover through a rotary switch; the rotary switch contains a first tab, a second tab and a rotary knob, wherein, the first tab is set up fixedly in the inner side of the top cover, and a bayonet is set up in the first tab; one end of the rotary knob penetrates into the bottom case through the outer side of the bottom case, and the second tab is fixedly installed on this end of the rotary switch, and rotation of the rotary switch drives the second tab to rotate and snap in the bayonet; a limit structure and a semi-limit structure are set up on the inner side of the bottom case with a position corresponding to the second tab; the second tab has idle state and clamping state; the space between the limit structure and the semi-limit structure limits the rotation stroke of the second tab under idle state; through the application of force on the second tab using the rotary knob, the second tab passed the semi-limit structure, the second tab is stuck in the bayonet and enables the second tab to maintain the clamping state, and at this point the rotation angle of the second tab is limited between the bayonet and the semi-limit structure, in order to realize the locking between the first tab and the second tab. a lamp housing; an LED module; electrical appliance; a lamp connecting member; wherein, the lamp housing is connected to a lamp pole through the lamp connecting member; the lamp housing contains bottom case and top cover, and the top cover and the bottom case constitute a cavity that accommodating the LED module and the electrical appliance; the top cover is rotatable connected with one side of the bottom case; the lamp connecting member (3, 4) is in the type of straight arm or bent arm; characterised in that the other side of the bottom case is connected to the other side of the top cover through a rotary switch; the rotary switch contains a first tab, a second tab and a rotary knob, wherein, the first tab is set up fixedly in the inner side of the top cover, and a bayonet is set up in the first tab; one end of the rotary knob penetrates into the bottom case through the outer side of the bottom case, and the second tab is fixedly installed on this end of the rotary switch, and rotation of the rotary switch drives the second tab to rotate and snap in the bayonet; a limit structure and a semi-limit structure are set up on the inner side of the bottom case with a position corresponding to the second tab; the second tab has idle state and clamping state; the space between the limit structure and the semi-limit structure limits the rotation stroke of the second tab under idle state; through the application of force on the second tab using the rotary knob, the second tab passed the semi-limit structure, the second tab is stuck in the bayonet and enables the second tab to maintain the clamping state, and at this point the rotation angle of the second tab is limited between the bayonet and the semi-limit structure, in order to realize the locking between the first tab and the second tab.