Soldering flux layered soldering pen

The invention provides a soldering flux layered soldering pen. The soldering flux layered soldering pen comprises an explosive pipe, a clamping end and a pen container, wherein the clamping end and the pen container are connected to one end of the explosive pipe. The soldering flux layered soldering pen is characterized in that the explosive pipe is filled with a soldering flux; an ignition head is arranged at an end of the bottom of the explosive pipe; an ignition section is arranged between the ignition head and the soldering flux in the explosive pipe; the top of the explosive pipe is sealed by the clamping end; the inner part of the explosive pipe is of a double-layered pipe structure including an inner-layer explosive pipe and an outer-layer explosive pipe; the inner-layer explosive pipe is filled with a slag forming constituent and an alloying agent; and the outer-layer explosive pipe is filled with a thermite and a small amount of inner-layer explosive pipe soldering flux material. The soldering flux l