The invention discloses an in-situ welding type one-time trial opening solid-state coded lock. The in-situ welding type one-time trial opening solid-state coded lock comprises an identification circuit and a fuse. The identification circuit is obtained through welding type OFF-ON switches. The fuse is connected with a power supply in a main circuit of a circuit. An electric executor is connected into a coded lock circuit, wherein one end of the electric executor is connected with the fuse, and the other end of the electric executor is connected with a correct unlocking access of the identification circuit. The N bit identification circuit comprises the 2N welding type OFF-ON switches and is formed by cascading the welding type OFF-ON switches in an N-stage cascading manner according to the logic that one switch is selected from the two switches of each stage. According to the in-situ welding type one-time trial opening solid-state coded lock, the welding type OFF-ON switches can control current to make the electric executor to work so that the current type solid-state coded lock can be formed, the welding type OFF-ON switches can control voltage to make the electric executor to work so that the voltage type solid-state coded lock can be formed, the welding type OFF-ON switches can control frequency to make the electric executor to work so that the frequency type solid-state coded lock can be formed, and the welding type OFF-ON switches can control pulse amplitude to make the electric executor to work so that the pulse type solid-state coded lock can be formed. By means of the irreversible characteristic of one-way switching, from the OFF state to the ON state, in the welding type OFF-ON switches, the fusion characteristic of the fuse and the circuit connection relation corresponding to a set code, the one-time trial opening function is achieved.