Transistor safety output circuit capable of transforming output form

The invention discloses a transistor safety output circuit capable of transforming an output form. An independent isolation suspension transistor bias circuit is employed for offsetting output transistors, the bias and output portions of the transistors are enabled not to be directly associated, and the output forms of the transistors do not affect the bias circuit. When the transistors are connected in series, the two transistors can be fully satirized and conducted. The circuit respectively leads out the source electrodes and the drain electrodes of the two output transistors, and according to concrete application types, the output forms can be combined and transformed into dual-NPN type, dual-PNP type, serial PNP type, serial NPN type and bipolar output. The demand for safe output in multiple forms can be met through one circuit, and the safety is not reduced. The production and application cost are low, and the safe application requirements of a user for transforming the output forms and only one performe