The invention belongs to the terminal device technology field and relates to a new type testing terminal with a function against locking from mal-operations and a special plug-in for the same. The testing terminal comprises a first wiring device, a second wiring device, a connection block and an insulation housing. The first wiring device and the second wiring device are connected through the connection block, wherein the first wiring device comprises a first wiring insertion hole. The first wiring insertion hole is provided therein with a positioning protrusion structure. The bottom of the first wiring insertion hole is provided with a protrusion type blocking round shaft; and the bottom of the protrusion type lock's round shaft is provided with a spring. The connection block comprises an upper connection sheet and a lower connection sheet. One side of each of the upper connection sheet and the lower connection sheet is provided with a U-shaped fork. The upper connection sheet is provided with an inverted-L-shaped insulation baffle plate. The testing terminal with a function against locking from mal-operations of the invention is simple in structure and convenient in operations. The working staff is required to operate orderly according to the sequence, otherwise, he or she cannot proceed to the following steps. In this manner, security-involved accidents can be effectively avoided due to the errors in operation sequence.