The invention relates to an automatic control type protector capable of passing reflow soldering, and belongs to automatic control protection components and parts used for electronic products. The automatic control type protector comprises a ceramic substrate, electrodes, an insulation layer, and a main conductive circuit. The ceramic substrate is a rectangular ceramic thin plate, and the four sides of the ceramic substrate are symmetrically provided with a first electrode, a second electrode, a third electrode, and a fourth electrode. A heating layer is connected with a pair of opposite electrodes, and is provided with the insulation layer, which is provided with an electrode layer. A barrier layer is disposed on at least another pair of opposite electrodes, and the main conductive circuit is connected between the electrode layer and the barrier layer by adopting a soldering or printing and sintering way. The automatic control type protector has a function of a common large current fuse, and at the same time, has a fast fuse function of automatically controlling the acceleration of the main conductive circuit. By adopting the design of the barrier layer, when the product passes the reflow soldering for mounting, the main conductive circuit is effectively prevented from being affected by solder wicking, and therefore the product can pass the reflow soldering safely.