A structure of security and protection for connection socket includes a connection socket, a connection block, a resilient member, and a security member. The connection socket forms a receiving space and a slide channel. The slide channel is located at one side of the receiving space. The connection block is coupled to a rear end of the connection socket and forms a positioning section. The resilient member includes at least one resilient engagement section and is arranged in the positioning section of the connection block. The security member has an end forming a bar section that forms at a rear side thereof a barb section. The barb section is coupled to the at least one resilient engagement section of the resilient member. The bar section has two ends extending rearward to connect to a plate section. The security member is received in the slide channel of the connection socket.