Motor positive pressure explosion-proof junction box

The utility model relates to a terminal box for a motor, which comprises a box body and electric appliance parts arranged in the box body, wherein, a wind guide pipe is fixed on the box body; the terminal box is communicated with a commutator chamber of a motor bedplate by the wind guide pipe to guide high-pressure wind in the bedplate into the terminal box, and the interior of the terminal box and the environment always keep a certain pressure difference, and thereby, the isolation between the interior and the exterior of the terminal box is realized; a wind pressure switch connected in a control circuit of the motor is arranged in the terminal box. When the air pressure in the terminal box is smaller than a certain value, a wind power switch is switched off from closure to enable the motor to automatically stop. The utility model adopts a positive pressure isolation and explosion protection principle to enable the effect of isolation of the terminal box and the environment and explosion protection to be better, and meanwhile, the wind pressure switch is arranged in the terminal box to provide guarantee for normal and safe running of the motor in the bad environment of harmful gas. The terminal box can be used for a drilling motor in an oil field, and can be applied to the field of coal mine exploitation and metallurgy steel rolling.